问题
单项选择题
在铰链四杆机构中，若两连架杆之一为曲柄，另一为摇杆，则该机构为（）
A.曲柄摇杆机构
B.双曲柄机构
C.双摇杆机构
D.偏心轮机构
答案
参考答案：A
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在铰链四杆机构中，若两连架杆之一为曲柄，另一为摇杆，则该机构为（）
A.曲柄摇杆机构
B.双曲柄机构
C.双摇杆机构
D.偏心轮机构
参考答案：A
| 根据短文内容，用方框所给词的适当形式填空。 | |
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| Last spring I was walking in a park. In front of me there was a mum and her 3-year-old daughter. The little girl was holding a string（线）,which had a balloon at the other 1 . All of a sudden, a 2 wind took the balloon from the little girl. I thought she would cry. But, no! As the little girl turned to watch her balloon rise to the 3 , she cheerfully shouted out, "Wow!" That little girl 4 me something. Later that day, I received a phone call from my friend, whotold me an unexpected problem. I felt like 5 with "Oh no, what should we do?” But remembering that little girl, I found 6 saying, “Wow, that is interesting! How can I help you?" One thing is for sure-life is always going to make us 7 unexpected problems. However, how to deal with them is our choice. We can choose to be annoyed or 8 . No matter what the situation is, a "Wow!" will always 9 "Oh, no." So the next time you meet one of life’s unexpected 10 , remember that little girl and make it a " Wow!" experience. The "Wow!" always works. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. |