旋涡泵在船上一般不用作()。
A.舱底水泵
B.辅锅炉给水泵
C.发电柴油机冷却水泵
D.压力水柜给水泵
参考答案:A
Tom kept silent about the accident _________ lose his job.
A.so not as to
B.in order not to
C.in order to not
D.not so as to
对可疑人员进行搜身,必须坚持安全而有效的原则,常见的搜身方法有()种。
A.1
B.2
C.3
D.4