问题
判断题
盐水钻井液中的降滤失剂主要是CMC，它随含盐量的增加而作用效果逐渐下降。
答案
参考答案：对
搜题请搜索小程序“爱下问搜题”
盐水钻井液中的降滤失剂主要是CMC，它随含盐量的增加而作用效果逐渐下降。
参考答案：对
| 请选择单词，并用适当的形式填空。 | |
2. We want to do some ____. 3. How____ the weather last week? 4. They ____ a comic movie last Saturday. 5. I am ____ for the Chinese test now. 6. Julia ____ her room every week. 7. My brother and I ____ in Beijing last Friday. 8. How long did you ____ here? 9. I ____ to the library two days ago. 10. Jeff ____ all his money on playing video games. |