关于铁粒幼细胞性贫血发病的机制，下列哪一项是错误的（） A.铁_爱下问搜题

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问题单项选择题 A1/A2型题

关于铁粒幼细胞性贫血发病的机制，下列哪一项是错误的（）

A.铁摄入过多

B.铁利用不良

C.血红素合成障碍

D.红细胞无效生成

E.本病有遗传性

答案

参考答案：A

选择题

John promised his doctor he _____ not smoke and he has never smoked ever since. [ ]

A. might

B. should

C. could

D. would

选择题

He forbids his children ____________ sweets because they do harm to their teeth.

A．eating

B．not eating

C．to eat

D．not to eat