电力机车的气压调压器共有()部分组成。
A.1
B.2
C.3
D.4
参考答案:D
用括号内所给单词的适当形式填空。
1. This kink of the fruits ______(taste) very sweet.
2. I want to ask him ______(have) a look at the book.
3. You must ______(finish) doing your home work.
4. What is he ______(make)?
5. Li Ming is going there ______(meet) his a friend.
下列关于岩体节理面的说法错误的是()。
A.节理面是岩体的弱结构,一般会使岩石的强度降低,变形模量降低
B.节理面还会导致岩体的变形和强度具有各向异性的特性
C.节理面的抗剪强度不能决定岩体的强度
D.节理面的抗剪强度可以用库仑准则表示