油层三大矛盾是指()。
A、区块矛盾
B、层间矛盾
C、层内矛盾
D、平面矛盾
参考答案:B, C, D
仿例句,根据给句子变形。
Mr Edison
例子: I have six balls.
Mr Edison has six balls.
1. He
I have a great sports collection.
2. She
They watch TV every day.
3. I
She has a friend.
4. Jim
I like sports.
5. They
We play soccer after school.
6. Kate
I don't play sports.
水内冷发电机的绝缘引水管,运行时要承受()的压力和()的作用,所以引水管要经水压试验。