关于腹腔镜下多囊卵巢的典型特征,下列描述不正确的是
A.卵巢包膜下见多个卵泡B.包膜增厚呈珍珠色C.卵巢体积增大D.卵巢表面血管增多呈网状E.卵巢表面有切迹
参考答案:E
He ________ the exam, but he was too careless.
A.could have passed
B.couldn’t have passed
C.must have passed
D.may have passed
封建社会的礼仪两个显著特点?