发动机机油泵按结构形式分为转子式和()两种。
参考答案:柱塞式
Ninety-six people lost their lives in a plane crash on April 10th, 2010, _________the Polish president and his wife.
A.except
B.beyond
C.between
D.including
血管炎病分类的原则是()
A.受累血管的大小
B.首先分为原发性和继发性
C.特异性病理、免疫改变
D.临床表现的特点
E.受累血管的部位’