正常人消化道内铁吸收效率最高的部位是（） A.空肠 B.十二指肠

搜题请搜索小程序“爱下问搜题”

问题单项选择题

正常人消化道内铁吸收效率最高的部位是（）

A.空肠

B.十二指肠及空肠上部

C.胃

D.回肠

E.回盲部

答案

参考答案：B

选择题

---________by the chemistry teacher for not finishing homework independently makes him feel very shameful.

---Yes. But he told me this morning he would spare no efforts to be the top one in our class.

A．Scolded

B．Having scolded

C．Being scolded

D．After being scolded

判断题

在EXCEL中，数学公式中可以使用中括号和大括号。