人工流产不包括()
A.过期流产
B.药物性流产
C.器械性流产
D.天花粉引产
E.剖宫取胎
参考答案:A
—Is the result of the experiment satisfactory?
—No, _____.
Which is wrong? [ ]
A. not a bit
B. by all means
C. by no means
D. not in the least
在已浇筑的混凝土强度未达到()以前,不得在其上踩踏或安装模板及支架等。
A.1.2N/mmz
B.2.5N/mm2
C.设计强度的259,6
D.设计强度的50%