如图5-12所示轴向拉压杆,1—1截面的轴力N的数值为()。
A.5kN
B.-5kN
C.10kN
D.-10kN
参考答案:B
解析:
(A)符号错;(C)、(D)数值不对。
-- Are these _______ all from No. 2 Middle School?
-- Yes. They often _________ their free time to help the old here.
A.volunteers; volunteers
B.volunteer; volunteers
C.volunteers; volunteer
D.volunteer; volunteer
具有收回条款的债券使企业融资具有较大弹性