A. throw to
B. throw to
C. throw at
D. throw away
在相同水头下,气蚀系数越大,动力真空(),越()气蚀。
A、越大,不容易
B、越大,容易
C、越小,不容易
D、越小,容易
A. round
B. along
C. with
D. at
A. to mix
B. at mixing
C. mixing
D. mixed
串联管的水击计算一般可通过等价水管法简化成简单管路进行计算。()
A.他汀类
B.依达拉奉
C.吡拉西坦
D.胞二磷胆碱