离心泵启动后,应注意检查()等。
A.电流表电流
B.泵的转向
C.泵出口压力
D.泵体泄漏情况
参考答案:A, B, C, D
两个因数的积是124,如果一个因数不变,另一个因数扩大10倍,那么积是______.
She all her business affairs before going on holiday. [ ]
A. organized
B. arranged
C. planned
D. prepared