刚度
参考答案:
材料受力时,其抵抗变形的能力。
判断下列命题的真假.
(1)命题“在△ABC中,若AB>AC,则∠C>∠B”的逆命题;
(2)命题“若ab≠0,则a≠0且b≠0”的否命题;
(3)命题“若a≠0,且b≠0,则ab≠0”的逆否命题
It is reported that more schools in Nanjing next year.
A.will be built
B.were built
C.have built
D.will build