用所给动词的正确形式填空。（5分）

小题1:They often                 　(熬夜)　before the exam.

小题2:He prefers __________(speak) English.

小题3:I want to be a             (use) man when I grow up.

小题4:Could you tell me some _______ (information) about Wenchuan earthquake?

小题5:I have two           (dictionary). One is English-Chinese, the other is Chinese-English.

从风机样本上查得风机Y4-73No.20F的某工况点性能参数如下表。指出以下计算哪项错误（）

A.风机的有效功率228kW

B.风机的内效率93%

C.联轴器传动效率98%

D.电机功率实际储备系数1.36