问题
单项选择题
在曲柄摇杆机构中,若曲柄为主动件,且作等速转动时,其从动件摇杆作()。
A.往复等速运动
B.往复变速运动
C.往复变速摆动
D.往复等速摆动
答案
参考答案:C
在曲柄摇杆机构中,若曲柄为主动件,且作等速转动时,其从动件摇杆作()。
A.往复等速运动
B.往复变速运动
C.往复变速摆动
D.往复等速摆动
参考答案:C
One day in the middle of the night, WangFei’s mother discovered the 小题8:________for the change. WangFei was playing computer games till 小题9:_______. It had a bad effect on him and had to be stopped. The next day his mother had a 小题10:______talk with WangFei instead of taking the computer away. She told him he was old enough to control himself. WangFei was happy he had such a wonderful mother and promised not to do that again. |