（）时正式设置进士科，我国科举制诞生。
A.唐太宗
B.隋炀帝
C.隋文帝
D.唐玄宗
参考答案：B
—Tom, it seems that you haven’t cleaned your bedroom the whole week .
—You didn’t come in around 10 yesterday morning; I ________ it .
A．cleaned
B．have cleaned
C．was cleaning
D．had cleaned
机油泵常用的形式有（）
A.转正式与膜片式
B.齿轮式与膜片式
C.齿轮式与转子式
D.转子式与柱塞式
