__is the mother of invention. This is remarkably true. (Necessary)
正确答案：
59．NecessityisthemotherofinventionThisisremarkablytrue(Necessary)名词
__isthemotherofinventionThisisremarkablytrue(Nece
本文来自网络，不代表煤炭资讯立场。转载请注明出处： http://www.mtxh.cn/zh/385886.html
