在铰链四杆机构中,当最短杆与最长杆长度之和小于和等于基余两杆长度之和时,取最短杆为机架时,将得到()。
A.双摇杆机构
B.曲柄摇杆机构
C.双曲柄机构
D.三曲柄机构
参考答案:C
在下列各句的空格内填上一个适当的完整的单词,该词的首字母已给出。
小题1:I should be the o of the time and can’t make time fly away from me.
小题2:Don’t go to the mall after ten o’clock in the evening. It always c at ten.
小题3:Don’t worry about your daughter. She’s old enough to take care of h .
小题4:Tony has visited many places of China, i Shanghai and Hangzhou.
小题5:Thursday is the f day of a week.
对于同电路串联的()继电器应该是匝数少的。