按允许电压损失选择导线时,导线上的电压损失应()最大允许值,以保证供电质量。
参考答案:低于
单句改错。
1. There are four peoples in my family.________
2. Are those your friend?________
3. That is his father friend.________
4. This isn’t her bag. It’s I bag.________
5. ---What are these?________
---These are apples.________
6. Are they your grandparent?________
7. ---Dad, he is my friend, Tom.
---Hello, Tom ________
8. Excuse me, is that yours watch? ________
9. Mr. Green is Jim father.________
10. What’s a name of his cat? ________
工件在水中淬火冷却的过程中会依次出现()阶段。
A、蒸汽膜、沸腾、对流
B、蒸汽膜、沸腾、传导
C、沸腾、蒸汽膜、传导
D、沸腾、蒸汽膜、对流