国家重点建设项目的邀请投标，应当经（）批准。
A.省人民政府
B.自治区人民政府
C.国务院相关部门
D.项目所在地政府
参考答案：C
—Is there any possible way to help them get rid of such a bad habit?
—To tell the truth, it’s very hard. But we ________ on this problem, trying to improve the situation .
A．worked
B．had worked
C．are working
D．had been working
可以并发DIC的流产为
A．先兆流产
B．难免流产
C．稽留流产
D．完全流产
E．习惯性流产
