问题
多项选择题
滚珠丝杠的支承方式有（）。
A.一端安装推力轴承，另一端悬伸
B.一端安装推力轴承，另一端安装向心轴承
C.两端都安装推力轴承
D.两端均安装双向推力轴堆
E.两端均安装向心球轴承
F.两端均安装推力轴承和向心球轴承
答案
参考答案：A, B, C, D
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滚珠丝杠的支承方式有（）。
A.一端安装推力轴承，另一端悬伸
B.一端安装推力轴承，另一端安装向心轴承
C.两端都安装推力轴承
D.两端均安装双向推力轴堆
E.两端均安装向心球轴承
F.两端均安装推力轴承和向心球轴承
参考答案：A, B, C, D
| 从方框中选择与下列句子中划线部分内容意思相同或相近的单词或短语。 | |
| ( )1. Our city has a wonderful program to help homeless people return to work. ( )2. They have been in the school for a long time. ( )3. How do you like living in the country? ( )4.You must come and have a visit. ( )5. That took place on the morning of October 12.
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