问题 单项选择题

急性胆囊炎引发腹痛的主要原因是______

A.结石嵌顿胆囊颈部,胆汁排空受阻,胆囊强力收缩
B.结石嵌顿胆囊管,胆汁排空受阻,胆囊强力收缩
C.结石嵌顿胆总管,刺激胆管平滑肌,Oddi括约肌痉挛
D.结石嵌顿胆总管,胆汁排空受阻,刺激胆囊收缩
E.炎症刺激

答案

参考答案:A

阅读理解

阅读下列短文,请根据题目要求,从短文内容中获取必要的信息,填在空格中。

    Pollution problems are becoming more and more serious. One of them is called "white pollution" caused

by plastic, such as shopping bags, boxes and cups. In China about three billion plastic shopping bags are used

every day, which results in a great waste of resources (资源) and heavy environmental pollution. Luckily, the

government has stopped us from using free plastic bags, telling all stores and supermarkets not to provide

customers (顾客) with free plastic bags since June 1, 2008. From then on, people have been supposed to use

cloth bags and shopping baskets instead of plastic bags in order to protect our environment.

    Now more and more people have realized the importance of using the cloth bags and the shopping baskets.

For one thing it can protect our environment, for another it can also make our country cleaner and more

beautiful. Yet we have much more things to do to solve the problem of "white pollution"!

1. One of the pollution problems is called __________________.

2. About __________________ plastic shopping bags are used every day in China.

3. All stores and supermarkets have been told not to provide customers with free plastic bags

    since __________________.

4. Using cloth bags and shopping baskets can not only protect our _______, but also make our country

    cleaner and more beautiful.

5. To solve the problem of "white pollution", we ought to do _________________.

默写题