题目内容

维生素D缺乏性佝偻病的原因不包括

A. 日光照射不足
B. 维生素D摄入不足
C. 生长速度快
D. 免疫力低下
E. 疾病与药物的影响

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患儿，男，3岁。体检发现颅骨软化、鸡胸并伴有X形腿。血钙2.1mmol/L，血磷1.6mmol/L。该患儿处于

A. 维生素D缺乏性佝偻病初期
B. 维生素D缺乏性佝偻病激期
C. 骨软化期
D. 维生素D缺乏性佝偻病恢复期
E. 维生素D缺乏性佝偻病后遗症期

---What’s in Mrs. Smith’s living room? ---_______ a television in the living room.

A. It is
B. There
C. There is
D. It

---Are his shoes dirty or clean? ---______

A. Yes,, they are.
B. No, they aren't.
C. They are clean.
D. They are clean or dirty.

There are _____ books on the stereo.

A. any
B. some
C. an
D. a