对金属钢闸门来说,常用的防腐蚀方法有()。
A.涂料防腐法
B.喷镀锌、铝防腐法
C.阴极保护与涂料联合防腐法
D.喷砂处理
参考答案:A, B, C
—_____?
—I can't sleep well at night. [ ]
A. How do you do
B. What ' s wrong with you
C. Are you feeling better
D. Did you take the medlcine
液压试验时地层的破裂易发生在()处。