问题 单项选择题 A1/A2型题

帕金森病的发病机制中表述不正确的是()。

A.黑质多巴胺减少的同时,乙酰胆碱功能也相对降低

B.多巴胺和乙酰胆碱对基底节环路起重要调节作用

C.单胺氧化酶B抑制剂可增加脑内多巴胺的含量

D.主要由于含黑色素神经元变性丢失

E.酪氨酸羟化酶和多巴脱羧酶减少

答案

参考答案:A

解析:帕金森病时由于黑质多巴胺能神经元变性、缺失,纹状体多巴胺含量显著降低,造成乙酰胆碱系统功能相当亢进。

阅读理解

Last year when Tom graduated from school, he came to Taibei. He didn't like to work on his father's farm and hoped to find a job in a big city. He went from one company to another but no one wanted him. With little money left, he got to the station, sad and tired. All he wanted to do was go back to his small town. It was very late at night and the station was full of people. They were waiting to buy tickets of the last train. He bought the last ticket, and he was very happy.

At that time, a woman with a crying baby walked to him and asked him to sell her the ticket. He gave her the ticket because he thought they needed it more than he did. After the train left, he sat on the bench and didn't know where to go. Suddenly, an old man came and said, "Young man, I have seen what you did to the woman. I am the owner of a big company. I need a good young man like you. Would you like to work for me?"

小题1:Tom came to the station to _______.

A.find a job

B.take the train home

C.sell the ticket

D.take the train to Taibei小题2:The woman walked to Tom because _______.

A.she was Tom's old friend

B.her child wanted to talk to Tom

C.she needed to take the train

D.she had no money to buy a ticket小题3:Tom didn't take the train because _______.

A.he didn't take a train ticket

B.he missed the train

C.he wanted to talk to the old man

D.he gave his ticket to the woman小题4:What can we learn from this story?

A.Many people find job in a train station.

B.Don't buy the last ticket of the train.

C.If we try our best to help others, others will help us.

D.We should not give our ticket to others in a train station.

单项选择题