问题 单项选择题

孕期营养不良对胎儿的影响,下列哪项错误()

A.孕妇缺锌可导致无脑儿和脊柱裂

B.孕期缺少维生素A可导致眼部缺陷

C.孕期摄入大量的维生素A亦可导致新生儿畸形

D.孕早期叶酸缺乏可引起胎儿神经管畸形

E.孕中期摄入多量的叶酸可引起胎儿脑积水

答案

参考答案:E

解析:近年来有关叶酸与神经管畸形关系的研究报道最多,并已取得了突破性进展。由英国医学研究会组织7国进行的随机双盲预防神经管畸形再发的营养干预试验于1991年结束,其结果肯定了妊娠1~3个月内每天补充4mg叶酸对神经管畸形的再发有较好的预防作用。由此可得出结论,在孕早期体内缺乏叶酸是神经管畸形发生的主要原因。

阅读理解

阅读下面一篇短文,判断下列句子是否符合短文内容,符合的用“A”,不符合的用“B”。

       Things have changed these days. Many old people complain about how fast things have changed, and they say the things in the old days were better. We all know that is not true. But there are really things have been worse.

       1. A lot of families broke down.

       If husband and wife have serious problems, they no longer stay together like before.  Many children

have only one parent. The parent often has to work for a long time to make money. He can't have enough

time with his child.  Even neither his father nor his mother lives with the child. This is bad for children's

growth.

       2. Too much traffic.

       The cars! No one walks anymore; almost everyone drives. We used to walk to school, walked to

factories, walked to parks, even in winter.  But now we don't. We drive everywhere. We drive all the time. It is bad for our health. And the air of the car pollutes our sky.

       3. We are too busy.

       Mother is busy now. In the old days, mother often stayed at home, cooking the dinner for the children and taking care of the children.  But now they have to work all day.  Father is busier than mother.  

Sometimes children can't see his father for weeks. Children are also busy.

       Life used to be poor and simple, but I can't say all the things are better now.

( )1. We all know that the things in the old days were better.

(     )2. Two bad things in these days are mentioned in this passage.

(     )3. Not all children live with their parents.

(     )4. Only children are not busy in a family.

(     )5. Life in these days is richer than that in the old days.

多项选择题