煤矿企业未取得（）的，不得从事生产活动。
A、IS09001认证
B、IS014000认证
C、安全生产许可证
D、公安部门认证
参考答案：C
Spoken English slightly differs from country to country. For instance, in some parts of the US the “r” sounds at the end of the words______.
A．is dropped
B．have dropped
C．has dropped
D．are dropped
人与人交往，约多大比例上运用语言性交流技巧
A．30%B．50%C．35%D．65%E．70%
