关于女性不孕因素哪项不正确()
A.输卵管发育不全
B.多囊卵巢
C.宫颈腺囊肿
D.子宫粘膜下肌瘤
E.严重 * * 炎
参考答案:C
把一个长、宽、高分别为6cm、4cm、5cm的长方体削成一个最大的圆锥,这个圆锥体积是多少?
Look! That fellow is too sleepy to work. He ______ up reading until midnight.
A.mustn’t stay
B.mustn’t have stayed
C.ought not to stay
D.should not have stayed