What is the minimum safe following distance?

273. What is the minimum safe following distance?

Single Choice Correct Rate: 84%

A. At least two seconds B. Far enough to see the car in front's brake lights C. At least 15 metres D. At least one second

Your answer is correct! {{vm.result.explain}}

Your answer is wrong! {{vm.result.explain}}

Last Question Next Question

Navigate to Question

基本文件流程错误 SQL 调试

/www/sites/aitinytools.com/index/public/index.php ( 0.79 KB )
/www/sites/aitinytools.com/index/vendor/autoload.php ( 0.73 KB )
/www/sites/aitinytools.com/index/vendor/composer/autoload_real.php ( 1.63 KB )
/www/sites/aitinytools.com/index/vendor/composer/platform_check.php ( 0.90 KB )
/www/sites/aitinytools.com/index/vendor/composer/ClassLoader.php ( 15.99 KB )
/www/sites/aitinytools.com/index/vendor/composer/autoload_static.php ( 9.30 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-helper/src/helper.php ( 8.34 KB )
/www/sites/aitinytools.com/index/vendor/ralouphie/getallheaders/src/getallheaders.php ( 1.60 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-orm/src/helper.php ( 1.45 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-orm/stubs/load_stubs.php ( 0.16 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/Exception.php ( 1.69 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-container/src/Facade.php ( 2.71 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-validate/src/helper.php ( 2.19 KB )
/www/sites/aitinytools.com/index/vendor/symfony/deprecation-contracts/function.php ( 0.99 KB )
/www/sites/aitinytools.com/index/vendor/guzzlehttp/guzzle/src/functions_include.php ( 0.16 KB )
/www/sites/aitinytools.com/index/vendor/guzzlehttp/guzzle/src/functions.php ( 5.55 KB )
/www/sites/aitinytools.com/index/vendor/symfony/polyfill-mbstring/bootstrap.php ( 8.26 KB )
/www/sites/aitinytools.com/index/vendor/symfony/polyfill-mbstring/bootstrap80.php ( 9.77 KB )
/www/sites/aitinytools.com/index/vendor/google/apiclient-services/autoload.php ( 1.28 KB )
/www/sites/aitinytools.com/index/vendor/phpseclib/phpseclib/phpseclib/bootstrap.php ( 0.72 KB )
/www/sites/aitinytools.com/index/vendor/symfony/var-dumper/Resources/functions/dump.php ( 1.60 KB )
/www/sites/aitinytools.com/index/vendor/google/apiclient/src/aliases.php ( 3.05 KB )
/www/sites/aitinytools.com/index/vendor/google/apiclient/src/Client.php ( 44.16 KB )
/www/sites/aitinytools.com/index/vendor/google/apiclient/src/Service.php ( 1.91 KB )
/www/sites/aitinytools.com/index/vendor/google/apiclient/src/AccessToken/Revoke.php ( 2.29 KB )
/www/sites/aitinytools.com/index/vendor/google/apiclient/src/AccessToken/Verify.php ( 7.94 KB )
/www/sites/aitinytools.com/index/vendor/google/apiclient/src/Model.php ( 10.00 KB )
/www/sites/aitinytools.com/index/vendor/google/apiclient/src/Utils/UriTemplate.php ( 10.74 KB )
/www/sites/aitinytools.com/index/vendor/google/apiclient/src/AuthHandler/Guzzle6AuthHandler.php ( 3.51 KB )
/www/sites/aitinytools.com/index/vendor/google/apiclient/src/AuthHandler/Guzzle7AuthHandler.php ( 0.71 KB )
/www/sites/aitinytools.com/index/vendor/google/apiclient/src/AuthHandler/AuthHandlerFactory.php ( 1.58 KB )
/www/sites/aitinytools.com/index/vendor/google/apiclient/src/Http/Batch.php ( 7.97 KB )
/www/sites/aitinytools.com/index/vendor/google/apiclient/src/Http/MediaFileUpload.php ( 9.87 KB )
/www/sites/aitinytools.com/index/vendor/google/apiclient/src/Http/REST.php ( 6.28 KB )
/www/sites/aitinytools.com/index/vendor/google/apiclient/src/Task/Retryable.php ( 0.73 KB )
/www/sites/aitinytools.com/index/vendor/google/apiclient/src/Task/Exception.php ( 0.70 KB )
/www/sites/aitinytools.com/index/vendor/google/apiclient/src/Exception.php ( 0.68 KB )
/www/sites/aitinytools.com/index/vendor/google/apiclient/src/Task/Runner.php ( 8.03 KB )
/www/sites/aitinytools.com/index/vendor/google/apiclient/src/Collection.php ( 3.04 KB )
/www/sites/aitinytools.com/index/vendor/google/apiclient/src/Service/Exception.php ( 1.99 KB )
/www/sites/aitinytools.com/index/vendor/google/apiclient/src/Service/Resource.php ( 11.49 KB )
/www/sites/aitinytools.com/index/vendor/google/apiclient/src/Task/Composer.php ( 3.67 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-dumper/src/helper.php ( 0.17 KB )
/www/sites/aitinytools.com/index/vendor/symfony/var-dumper/VarDumper.php ( 3.96 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/App.php ( 15.16 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-container/src/Container.php ( 15.62 KB )
/www/sites/aitinytools.com/index/vendor/psr/container/src/ContainerInterface.php ( 1.02 KB )
/www/sites/aitinytools.com/index/app/provider.php ( 0.19 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/Http.php ( 6.04 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-helper/src/helper/Str.php ( 7.29 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/Env.php ( 4.68 KB )
/www/sites/aitinytools.com/index/app/common.php ( 8.39 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/helper.php ( 18.78 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/Config.php ( 5.54 KB )
/www/sites/aitinytools.com/index/config/app.php ( 1.75 KB )
/www/sites/aitinytools.com/index/config/cache.php ( 0.79 KB )
/www/sites/aitinytools.com/index/config/console.php ( 0.23 KB )
/www/sites/aitinytools.com/index/config/cookie.php ( 0.58 KB )
/www/sites/aitinytools.com/index/config/database.php ( 6.48 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/facade/Env.php ( 1.67 KB )
/www/sites/aitinytools.com/index/config/filesystem.php ( 0.61 KB )
/www/sites/aitinytools.com/index/config/lang.php ( 1.55 KB )
/www/sites/aitinytools.com/index/config/log.php ( 1.35 KB )
/www/sites/aitinytools.com/index/config/middleware.php ( 0.19 KB )
/www/sites/aitinytools.com/index/config/route.php ( 1.75 KB )
/www/sites/aitinytools.com/index/config/session.php ( 0.57 KB )
/www/sites/aitinytools.com/index/config/site.php ( 1.78 KB )
/www/sites/aitinytools.com/index/config/trace.php ( 0.34 KB )
/www/sites/aitinytools.com/index/config/view.php ( 0.82 KB )
/www/sites/aitinytools.com/index/app/event.php ( 0.25 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/Event.php ( 7.67 KB )
/www/sites/aitinytools.com/index/app/service.php ( 0.13 KB )
/www/sites/aitinytools.com/index/app/AppService.php ( 0.26 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/Service.php ( 1.64 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/Lang.php ( 7.35 KB )
/www/sites/aitinytools.com/index/app/common/lang/en-us.php ( 1.02 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/initializer/Error.php ( 3.31 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/initializer/RegisterService.php ( 1.33 KB )
/www/sites/aitinytools.com/index/vendor/services.php ( 0.17 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/service/PaginatorService.php ( 1.52 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/service/ValidateService.php ( 0.99 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/service/ModelService.php ( 1.75 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-multi-app/src/Service.php ( 1.08 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-trace/src/Service.php ( 0.77 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/Middleware.php ( 6.72 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/initializer/BootService.php ( 0.77 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-orm/src/Paginator.php ( 11.71 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-validate/src/Validate.php ( 62.12 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-orm/src/Model.php ( 30.13 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-orm/src/model/concern/Attribute.php ( 20.38 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-orm/src/model/concern/RelationShip.php ( 26.75 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-orm/src/model/concern/ModelEvent.php ( 2.62 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-orm/src/model/concern/TimeStamp.php ( 5.86 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-orm/src/model/concern/AutoWriteId.php ( 1.44 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-orm/src/model/concern/Conversion.php ( 10.84 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-helper/src/contract/Arrayable.php ( 0.09 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-helper/src/contract/Jsonable.php ( 0.13 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-orm/src/model/contract/Modelable.php ( 0.09 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/Db.php ( 2.88 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-orm/src/DbManager.php ( 8.33 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/Log.php ( 6.28 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/Manager.php ( 3.92 KB )
/www/sites/aitinytools.com/index/vendor/psr/log/src/LoggerTrait.php ( 2.69 KB )
/www/sites/aitinytools.com/index/vendor/psr/log/src/LoggerInterface.php ( 2.71 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/Cache.php ( 4.92 KB )
/www/sites/aitinytools.com/index/vendor/psr/simple-cache/src/CacheInterface.php ( 4.71 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-helper/src/helper/Arr.php ( 16.08 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/cache/driver/File.php ( 7.84 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/cache/Driver.php ( 9.03 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/contract/CacheHandlerInterface.php ( 1.99 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/Console.php ( 22.81 KB )
/www/sites/aitinytools.com/index/app/Request.php ( 0.09 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/Request.php ( 55.78 KB )
/www/sites/aitinytools.com/index/app/middleware.php ( 0.30 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/Pipeline.php ( 2.61 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-trace/src/TraceDebug.php ( 2.94 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/middleware/SessionInit.php ( 1.94 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/Session.php ( 1.80 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/session/driver/File.php ( 6.27 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/contract/SessionHandlerInterface.php ( 0.87 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/session/Store.php ( 7.12 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/middleware/LoadLangPack.php ( 3.50 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/Cookie.php ( 6.06 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-multi-app/src/MultiApp.php ( 7.06 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/Route.php ( 23.56 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/route/RuleName.php ( 5.34 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/route/Domain.php ( 1.25 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/route/RuleGroup.php ( 20.45 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/route/Rule.php ( 26.35 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/route/RuleItem.php ( 9.78 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/route/dispatch/Controller.php ( 3.75 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/route/Dispatch.php ( 10.54 KB )
/www/sites/aitinytools.com/index/app/driving/controller/Question.php ( 1.21 KB )
/www/sites/aitinytools.com/index/app/BaseController.php ( 5.28 KB )
/www/sites/aitinytools.com/index/app/account/controller/LoginStatus.php ( 1.44 KB )
/www/sites/aitinytools.com/index/app/common/controller/Page.php ( 1.03 KB )
/www/sites/aitinytools.com/index/app/common/controller/StructureData.php ( 0.59 KB )
/www/sites/aitinytools.com/index/app/driving/controller/GetQuestion.php ( 1.44 KB )
/www/sites/aitinytools.com/index/app/driving/model/DrivingQuestion.php ( 0.33 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-orm/src/db/connector/Mysql.php ( 4.33 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-orm/src/db/PDOConnection.php ( 51.85 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-orm/src/db/Connection.php ( 8.83 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-orm/src/db/ConnectionInterface.php ( 4.86 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-orm/src/db/builder/Mysql.php ( 16.56 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-orm/src/db/Builder.php ( 23.08 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-orm/src/db/BaseBuilder.php ( 27.29 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-orm/src/db/Query.php ( 13.88 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-orm/src/db/BaseQuery.php ( 43.62 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-orm/src/db/concern/TimeFieldQuery.php ( 7.43 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-orm/src/db/concern/AggregateQuery.php ( 3.26 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-orm/src/db/concern/ModelRelationQuery.php ( 19.47 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-orm/src/db/concern/ParamsBind.php ( 3.66 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-orm/src/db/concern/ResultOperation.php ( 7.01 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-orm/src/db/concern/WhereQuery.php ( 18.79 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-orm/src/db/concern/JoinAndViewQuery.php ( 6.96 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-orm/src/db/concern/TableFieldInfo.php ( 2.63 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-orm/src/db/concern/Transaction.php ( 2.77 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/log/driver/File.php ( 6.19 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/contract/LogHandlerInterface.php ( 0.86 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/log/Channel.php ( 3.88 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/event/LogRecord.php ( 0.86 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-orm/src/model/Collection.php ( 6.98 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-helper/src/Collection.php ( 16.48 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/facade/Lang.php ( 1.68 KB )
/www/sites/aitinytools.com/index/app/driving/model/DrivingQuestionI18n.php ( 0.19 KB )
/www/sites/aitinytools.com/index/app/model/Article.php ( 0.96 KB )
/www/sites/aitinytools.com/index/app/model/BaseModel.php ( 0.97 KB )
/www/sites/aitinytools.com/index/app/model/ArticleI18n.php ( 0.12 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-template/src/Template.php ( 46.61 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-template/src/template/driver/File.php ( 2.41 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-template/src/template/contract/DriverInterface.php ( 0.86 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/facade/Config.php ( 1.37 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/facade/Request.php ( 9.20 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/facade/Session.php ( 1.79 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/facade/Cookie.php ( 1.48 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/facade/Cache.php ( 2.06 KB )
/www/sites/aitinytools.com/index/app/model/CMenu.php ( 0.23 KB )
/www/sites/aitinytools.com/index/runtime/557d3988efb4e84337f5ee28e420e96e.php ( 25.33 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/Response.php ( 8.81 KB )
/www/sites/aitinytools.com/index/vendor/topthink/framework/src/think/response/Html.php ( 0.97 KB )
/www/sites/aitinytools.com/index/vendor/topthink/think-trace/src/Html.php ( 4.49 KB )

0.282715s