问题
多项选择题
油井水力压裂增产增注的原理主要是（）。
A.形成裂缝
B.改变渗流状态
C.降低阻力
D.增加动力
E.消除污染
答案
参考答案：B, C
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油井水力压裂增产增注的原理主要是（）。
A.形成裂缝
B.改变渗流状态
C.降低阻力
D.增加动力
E.消除污染
参考答案：B, C
| 根据短文内容，选择正确答案。 | ||||||||
Clothes (衣服)
| ||||||||
[ ] | ||||||||
| A. It's brown. B. It's green. C. It's red. | ||||||||
| 2. Is the dress new? | ||||||||
[ ] | ||||||||
| A. Yes, it is. B. No, it is. C. No, it isn't. | ||||||||
| 3. The sweater is ______________. | ||||||||
[ ] | ||||||||
| A. black B. yellow C. white | ||||||||
| 4. The socks are ______________. | ||||||||
[ ] | ||||||||
| A. blue B. new C. red | ||||||||
| 5. I ______________ my new clothes. | ||||||||
[ ] | ||||||||
| A. don't like B. likes C. like |
It is a red shirt.
It is a new (新的) dress.
It is a yellow sweater.
It is a new coat (外套).
They are new socks.
They are brown shoes.
They are new pants
I like my new clothes.