闭经病人，测血中FSH值为50U／L，应诊断为（）
A.垂体性闭经
B.子宫性闭经
C.卵巢性闭经
D.丘脑下部性闭经
E.甲状腺疾病引起闭经
参考答案：C
What is he doing? ___________ [ ]
A. He is reading a book.
B. He is writing on the paper.
C. He is playing football.
大承气汤可治疗（）致痉。
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