不属于受精卵着床的必备条件的是()
A.透明带消失
B.合体滋养层细胞形成
C.有足量的孕酮支持
D.囊胚和子宫内膜的发育必须同步
E.子宫内膜蜕膜变
参考答案:E
形成性评价往往具有对后续阶段课程的诊断性评价作用。
What is TRUE concerning frapping lines?()
A.They are used to steady a lifeboat when lowered
B.They are normally attached to the davit span
C.They are needed only on radial davits
D.They are used to clear the puddings