下列何种肿瘤可引起子宫内膜增生过长（）。
A.卵巢浆液性肿瘤
B.卵巢内胚窦瘤
C.无性细胞瘤
D.颗粒细胞瘤
E.畸胎瘤
参考答案：D
—Would you mind giving your advice on how to improve our efficiency?
—If you make _____ most of forty-five minutes classes day after day, there will be _____ switch in grades.
A．/; /
B．the; a
C．/; a
D．the; /
天然高分子囊材
A．明胶B．乙基纤维素C．聚乳酸D．β-CDE．枸橼酸
