所有圆的直径都相等，半径都相等。[ ]
错误
When the man came in, gun in hand,we all stood there, ________. [ ]
A. astonishing
B. being astonished
C. astonished
D. having astonished
AF002离心泵选型时，要求泵的输出流量（）实际操作流量。
A.大于
B.等于
C.小于
D.不确定
