问题
单项选择题
下列传动方式中，不能起过载保护作用的是（）
A．齿轮传动
B．带传动
C．液力传动
D．摩擦轮传动
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
下列传动方式中，不能起过载保护作用的是（）
A．齿轮传动
B．带传动
C．液力传动
D．摩擦轮传动
参考答案：A
| 用单词的适当形式填空。 | |
| |
| 1. Please ____ the window. It's hot in the room. 2. Mr. Green likes _____ in China very much. 3. —What _____ your father _____? —He is a doctor. 4. Uncle Wang _____ a kite for me. He is busy. 5. My father often _____ to bed at 10:00 in the evening. 6. Can you _____ in the river? 7. There _____ a ruler and two pencils on the desk. 8. Kate wants _____ a new watch. His old one is broken. 9. Listen! The girls ______ in the classroom. How happy they are! 10. Li Ming's mother is a teacher. She _____ English in our school. |