双作用式叶片泵只能做成()。
参考答案:定量泵
同义句转换。
1. To be honest,I don't like him very much.
_____ , I don't like him very much.
2. Frankly speaking,the question is not open to discussion.
_____, the question is not open to discussion.
继发性肺脓肿不常见于下列哪种情况
A.膈下脓肿
B.支气管扩张
C.支气管囊肿
D.支气管肺癌
E.肺炎支原体肺炎