齐家文化的()是人们在建筑技术史上的一大创举。
参考答案:半地穴式的白灰面房子
Until we have discussed all the details, no decision _______ about any new operations.
A.will be made
B.is made
C.is being made
D.has been made
关于宫内节育器避孕原理,错误的是()
A.抑制排卵
B.宫腔的机械作用
C.非细菌性炎性反应
D.前列腺素释放
E.活性物质释放