问题
单项选择题
凸轮结构分为（）二种。
A.圆形凸轮和杆形凸轮
B.角形凸轮和少齿凸轮
C.移动凸轮和固定凸轮
D.盘形凸轮和圆柱凸轮
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
凸轮结构分为（）二种。
A.圆形凸轮和杆形凸轮
B.角形凸轮和少齿凸轮
C.移动凸轮和固定凸轮
D.盘形凸轮和圆柱凸轮
参考答案：D
| 选词填空。 | |
is five 5______ old. She 6______ bamboo 7______, stems and shoots, and she also has milk and 8______. Mimi is very 9______ .She is afraid of people 10______ they kill pandas for their fur (毛). |