【判断题】在铰链四杆机构中,能作整周连续旋转的构件称为曲柄 ,只能来回摇摆某一角度的构件称为摇杆
【判断题】在铰链四杆机构中,能作整周连续旋转的构件称为摇杆,能在一定角度内往复摆动的构件称为连杆。
【单选题】Why does Mr. Collins refuse to accept the seller’s price at the beginning?
A.
Because the price list is on FOB basis.
B.
Because Mr. Collins is not satisfied with the quality of the product.
C.
Because Mr. Collins thinks the price is on the high side.
D.
Because the products are immitations.
【单选题】Why Mrs Bennet wanted to leave Lizzy alone with Mr Collins? Because _____________
A.
She was eager to make Lizzy marry Mr Collins.
B.
She did not know how to refuse Mr Collins.
C.
Mr Collins forced her to do so.
D.
Lizzy was willing to have a private conversation with Mr Collins.
【单选题】在铰链四杆机构中,能作整周连续旋转的构件称为_______
【判断题】The receptionist asks Mr. Collins to take a seat and read magazines while he is waiting.
【单选题】Mr. Li asks us to remember that __________ careful we are, _________ mistakes we will make.
【判断题】在铰链四杆机构中,能作整周连续旋转的构件称为 曲柄