给水泵出口装设再循环管的目的是为了防止给水泵在低负荷时发生汽化。
参考答案：对
—_________ I take some photos in the hall, sir? —No, you _________.
A．Can, needn't
B．Must, mustn't
C．Could, won't
D．May, mustn't
罪犯劳动目标的实践运行与其定位的偏差
