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【简答题】

Surprisingly enough, none of them was late. It ________ that all of them were on time.

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参考答案:
参考解析:
.
刷刷题刷刷变学霸
举一反三

【单选题】是一种常染色体遗传病,牙冠呈微黄半透明,光照下呈现乳光色的是

A.
釉质发育不全
B.
氟牙症
C.
四环素牙
D.
牙本质发育不全症
E.
牙骨质发育小全症