辅锅炉平板式玻璃水位计靠水一侧加衬云母片的目的是()
A.便于观察水位
B.防玻璃板腐蚀
C.加强密封性
D.便于XX观察水位
参考答案:B
Twenty men fell into the water and were _____ by other boats. As a result, they missed the fighting on the beach.
A.picked out
B.picked over
C.picked up
D.picked on
在Java语言中,不允许使用指针体现出的Java特性是
A) 可移植 B) 解释执行C) 健壮性 D) 安全性