用作调节油基钻井液的粘度、切力,降低滤失量的粘土是()。
A、有机土
B、抗盐土
C、伊利石粘土
D、高岭石粘土
参考答案:A
用所给单词的适当形式填空。
1. Can your aunt _____ (speak) English?
2. Please_____ (call) me when your mother gets home.
3. He often _____ (watch) TV on Sundays.
4. How much _____ (be) the T-shirts?
5. Does your brother _____ (have)a tennis racket?
6. I like bananas and my sister _____ (like) bananas, too.
7. Jim usually _____ ( eat) his breakfast at seven.
8. Miss Miller is our math teacher. We all like_____ ( she).
9. Please come and see for _____ (you) at Hongda Clothes Store.
10. Our English speech is on June_____ (one).
列车由尖轨向辙叉运行时,该道岔为进路上的()。
A.带动道岔
B.防护道岔
C.顺向道岔
D.对向道岔