题目内容

若被输送的流体粘度增高，则离心泵的压头减小，流量减小，效率降低，轴功率增大。

A. 对
B. 错

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Whose horse wins the race?

A. Namjin's
B. Mukhdalai's
C. neitherNamjin's norMukhdalai's

There are horses in the race this year.

A. 20
B. 80

The race is kilometers long.

A. 25
B. 50

At the start of the race, horse is faster.

A. Mukhdalai's
B. Namjin's