问题
单项选择题
线材拉伸后,表面发生擦伤,其主要原因是()。
A.酸洗不净
B.鼓轮上有沟槽
C.模孔形状不合适
D.反拉力过大
答案
参考答案:B
线材拉伸后,表面发生擦伤,其主要原因是()。
A.酸洗不净
B.鼓轮上有沟槽
C.模孔形状不合适
D.反拉力过大
参考答案:B
Context communication. 根据提供的情景,选择恰当的句子。 |
1. 当你想问你的朋友旅行是否愉快时,你应说: |
[ ] |
A. Hello. B. How are you? C. Did you have a good trip? |
2. 当你想问别人是否喜欢中国时,你应说: |
[ ] |
A. Would you like China? B. Do you like China? C. How about China? |
3. 当你想把你的朋友李雷介绍给你的朋友时,你应说: |
[ ] |
A. It is my friend, Li Lei. B. He is Li Lei. C. This is my friend, Li Lei. |
4. 当你想问谁想唱支歌时,你应说: |
[ ] |
A. Who wants to sing a song? B. Do you like a song? C. Do you want to sing a song? |
5. 当你想说到吃午饭的时间了,你应说: |
[ ] |
A. It's for lunch. B. Time for lunch. C. It is lunch now. |