还没有登录哦！

[Problem Solving]

试题详情

题目：

Phobus, one of the satellites of Mars, revolves about Mars at a distance of approximately 5,800 miles from the center of Mars and approximately 3,700 miles from the surface of Mars. If it is assumed that Mars is spherical and the orbit of Phobus is circular, what is the approximate circumference, in miles, of Mars at its equator?

选项:

A、2,100π
B、4,200π
C、7,400π
D、9,500π
E、190,000π

答案:

B

提问：

ps

解答：

点赞0
阅读805
解答： sysadmin

提问：

ps

解答：

点赞0
阅读806
解答： sysadmin老师

问个问题

注册太麻烦？点这里查看免费答疑吧！

学长故事

免扫码试听

24小时随身答疑小程序

GMAT每日一题

点我领取
免费专项课程
 在线咨询

( ! ) Fatal error: Uncaught yii\web\HeadersAlreadySentException: Headers already sent in /data/www/gmat-didi/vendor/yiisoft/yii2/web/Response.php on line 438. in /data/www/gmat-didi/vendor/yiisoft/yii2/web/Response.php on line 373
( ! ) yii\web\HeadersAlreadySentException: Headers already sent in /data/www/gmat-didi/vendor/yiisoft/yii2/web/Response.php on line 438. in /data/www/gmat-didi/vendor/yiisoft/yii2/web/Response.php on line 373
Call Stack
#TimeMemoryFunctionLocation
10.07343142752yii\web\ErrorHandler->handleFatalError( ).../ErrorHandler.php:0
20.07352825768yii\web\ErrorHandler->renderException( $exception = class yii\base\ErrorException { protected $message = 'Module \'zip\' already loaded'; private ${Exception}string = 'yii\\base\\ErrorException: Module \'zip\' already loaded in Unknown:0\nStack trace:\n#0 {main}'; protected $code = 32; protected $file = 'Unknown'; protected $line = 0; private ${Exception}trace = []; private ${Exception}previous = NULL; protected $severity = 32 } ).../ErrorHandler.php:288
30.07382820232yii\web\Response->send( ).../ErrorHandler.php:136
40.07392821488yii\web\Response->sendHeaders( ).../Response.php:346