问题 单项选择题 A1/A2型题

正常人体生理状态下钙泵转运过程属于下列细胞膜跨膜物质转运中的哪一种()

A.单纯扩散

B.易化扩散

C.主动转运

D.胞吞

E.被动转运

答案

参考答案:C

阅读理解

阅读理解。

     Do you like drinking Coke? As a symbol of American culture, Coca-Cola is liked by many people,

especially young people all around the world. But from now on, perhaps it will be hard for students in the

US to get it in school. A new agreement will end almost all sales of high-sugar fuzzy (起泡的) drinks in the

US schools.

    The agreement allows only unsweetened juice (无糖果汁), low-fat milk and water in primary and middle

school vending machines (投币式自动售货机) and cafeterias. The agreement is "a bold (大胆的) step

forward in the struggle to help 35 million young people lead healthier lives".

     Rising childhood obesity (肥胖) has become a big problem in America. A report noted that obesity has

tripled (增至三倍) among teenagers in the past 25 years. It called for new limits on the marketing of junk

food to children. Soda is a particular target because of its caloric content and popularity among children.

     Britain has already taken steps to fight obesity. A recent study shows that people in the UK are much

healthier than the people in the US. However, it's better late than never. Now American schools are trying

to make new regulations to guide the students to choose healthy drinks.

1. According to the agreement, which will not be allowed in the US schools?

A. Unsweetened juice.

B. Low-fat milk.

C. Water.

D. Pepsi.

2. _________ has become a big problem in America.

A. Junk food

B. Drinking coke

C. Obesity

D. Health

3. Why is soda a particular target?

A. Because it tastes good.

B. Because it has more calories and is popular among kids.

C. Because it is not a healthy diet.

D. Because it is a symbol of American culture.

4. What can we learn from the last paragraph?

A. Britain has no such problem as obesity.

B. People in the UK are healthier than people in the US.

C. Americans are much healthier than British people.

D. New regulations have been made to guide students in the US schools.

填空题