单项选择题
On May 3, 1949 Hang zhou was liberated . It began to wr...
单项选择题On May 3, 1949 Hang zhou was liberated . It began to write its new chapter of development in history. A. 对 B. 错
中南快速加油站拥有单线服务设备，其平均服务率是每小时4.38辆车，在现有的资源条件下，该设备完成一项服务平均需...
单项选择题中南快速加油站拥有单线服务设备，其平均服务率是每小时4.38辆车，在现有的资源条件下，该设备完成一项服务平均需花费8分钟，已知服务准备时间服从负指数分布，试确定：两辆以上交通工具同时需要利用该设备的概率为多少？ A. 0.199 B. 0.311 C. 0.341 D. 0.116
The slang “ It rains cats and dogs” is used to describe...
多项选择题The slang “ It rains cats and dogs” is used to describe______. ( ) A. It rains heavily. B. the rain cannot stop the dogs and cats to go out. C. the rain drops like dogs and cats falling down from the sky. D. the rains drives the dogs and cats away.
