搜题请搜索小程序“爱下问搜题”
问题 单项选择题

鸡蛋中干扰铁吸收的成分是（）

A.抗生物素

B.抗胰蛋白酶

C.卵黄高磷蛋白

D.磷脂

E.胆固醇

答案

参考答案：C

解析：卵黄中含有高磷蛋白，该种蛋白可与铁进行结合，从而使铁的吸收率降低。

填空题

用括号内所给词的适当形式填空。

1. — The             (develop) of new products is important to our company. Do you know?

    — Yeah, it is our duty to try our best to deal with it.

2. I think the most helpful             (invent) is the light bulb (电灯泡). It gives people more time to work and

     play.

3. The foreigner spoke English so             (quick) that I could hardly understand what he said.

4. The large population of China has caused many             (difficult). For example, many farmers have no

    farmland to grow crops on.

5. — What do you think of the English             (train) school? 

    — It is great. I have improved my English a lot.

查看答案
单项选择题

匡女士，27岁，孕1产0。妊娠16周。有风湿性心脏病，二尖瓣狭窄史。心功能Ⅱ级

该孕妇最不易发生心力衰竭的时间是

A．妊娠20周～22周

B．妊娠32周～34周

C．分娩第一产程

D．分娩第二产程

E．产后48小时内
查看答案