如图5-12所示,刚性杆AB由3根材料横截面面积均相同的杆吊挂。在结构中,()为零。
A.杆1的轴力
B.C点的水平位移
C.杆2的轴力
D.C点的垂直位移
参考答案:C
托盘天平调节好后,在称量时,发现指针向右偏,这时应( )
A.向右盘中添加砝码
B.将游码向右移动
C.减少盘中的砝码
D.将横梁右端螺母向左旋
—What do you think of this film?
—It's than the last one, I think.
A.interesting
B.interested
C.more interesting
D.more interested