问题 单项选择题 A1/A2型题

关于妊娠合并巨幼红细胞性贫血的原因,哪项是不恰当的()

A.叶酸从尿中排泄增多

B.妊娠期胃酸减少,肠蠕动减弱,影响叶酸的吸收

C.妊娠期需要量增加

D.当叶酸和维生素B12缺乏时可使RNA合成受阻,导致红细胞体积增大并且迅速受到破坏而发生贫血

E.妊娠合并胃肠道疾病可影响维生素B12吸收

答案

参考答案:D

解析:叶酸从尿中排泄增多

阅读理解

It was getting dark and snow was coming down. Joe was driving home. He'd been unemployed since the factory closed. Most of his friends had left, but he stayed on. After all, he was born here. Suddenly he saw a lady standing on the side of the road and then he pulled up. She was worried. No one had stopped to help her. Was he going to hurt her? He looked poor and hungry. Joe knew how she felt and said, “My name is Joe and I'm here to help you.” All she had was a flat tire, but for an old lady, that was bad enough. Joe changed the tire, but he got dirty and his hands were hurt.

She wanted to pay Joe and said any amount would have been all right. Joe never thought twice about the money and there were plenty who had given him a hand in the past. He had lived his whole life that way. He told her that if she really wanted to pay him back, the next time she saw someone who needed help, she could give that person the assistance that they needed. Later the lady went in a small restaurant to take a bite to eat. The cash register was like the telephone of an out-of-work actor-it didn't ring much. The waitress, who was nearly eight months pregnant (怀孕) brought a clean towel to her with a sweet smile. The old lady remembered Joe. After the waitress brought the change from a 100-dollar bill, she found the lady gone and something written on a piece of paper “Someone once helped me out-the way I'm helping you. If you really want to pay me back, don't let the chain of love end with you.” That night the waitress gave her sleeping husband a soft kiss and whispered, “Everything's going to be all right. I love you, Joe.”

小题1:What did Joe do that dark snowy evening?

A.He drove to work.

B.He helped an old lady with a flat tire.

C.He gave an old lady a lift.

D.He helped an old lady push her car. .小题2:The underlined sentence “she wanted to pay Joe and...”suggests that ________.

A.the old lady was very grateful to Joe's timely aid

B.the old lady cared little about money

C.the old lady didn't have money on hand to pay Joe

D.the old lady wanted to pay Joe less小题3:We can learn from this passage that ________.

A.the old lady knew the waitress was Joe's wife

B.the old lady had a big meal in the small restaurant

C.Joe would have a baby soon

D.Joe helped a lot of people in the past小题4:Which of the following would be the best title for the passage?

A.Acts of luck

B.A warm-hearted man

C.A well-off lady

D.The chain of love

单项选择题