问题 完形填空

请认真阅读下面短文,并根据短文内容回答问题。

Nearly all American students in colleges and universities pay for their education. There are many expenses. First of all, there is tuition (学费). At some schools, the tuition is very high, ten thousand dollars a year or more. At other schools, it may only be a few hundred dollars a year. At some community (社区) colleges, tuition is free. There are other expenses as well. Many students leave their homes to go to schools in other cities. They may live in dormitories or apartments ( flats), and they must pay for it. Finally, students must buy textbooks for their courses. Some families start saving money for their children’s education when the children are small. Many students work to save money for tuition. They can also get loans (贷款) from the government. They pay the money back to the government when they finish their education.                        

1. Which students pay for their education?

2. How much is the higher tuition?

3. Are there any free tuition colleges?

4. What must students buy finally?

5. When do many students pay back their loans from the government?

答案

1.Nearly all American students in colleges and universities pay for their education.

2.At some schools, the tuition is very high, ten thousand dollars a year or more.

3.yes,there are .

4.Finally, students must buy textbooks for their courses.

5.They pay the money back to the government when they finish their education.

1. 特殊疑问句。根据Nearly all American students in colleges and universities pay for their education可知几乎所有的美国大学生都要付钱。

2. 特殊疑问句。根据the tuition is very high, ten thousand dollars a year or more可得出答案。

3. 一般疑问句。根据At some community (社区) colleges, tuition is free可知在有些大学社区,学费是可以免费的,故答:Yes, there are。

4. 特殊疑问句。根据Finally, students must buy textbooks for their courses可知最后他们必须买笔记本的。

5. 特殊疑问句。根据文章最后一句They pay the money back to the government when they finish their education可知他们是在毕业后还政府的钱。

单项选择题

美国乔治亚州的神经科学家把大鼠分为两组:一组喂高果糖饲料,另一组喂含同样能量的玉米淀粉饲料。然后,科学家们对大鼠进行训练,把它们放进水池,让它们在各种提示下学会找到水池中的一个水下平台。两组大鼠都很快找到了那个平台,然后停在那里休息。这说明,它们具有很好的学习能力。

两天之后,研究者把水下平台撤掉,但各种提示不变,看看大鼠们现在是否还记得那个地方。结果发现,喂玉米淀粉的那一组老鼠还记得平台的位置,它们总是向那里游去。而喂果糖的那一组老鼠好像根本不记得那里有个平台的事。

研究者分析说,这是因为高果糖大鼠存在胰岛素抵抗的缘故。此前已经有研究发现,在胰岛素抵抗的仓鼠当中,大脑的海马区域功能受到了损害,而这个海马区域正好是负责学习和记忆的部位。那么,如果经常摄入会降低胰岛素敏感度的食物,比如高果糖食物,就会损害动物的学习记忆功能。

在食品当中,果糖的主要来源就是清凉饮料,因为它们往往用高果葡萄糖浆来调味。果糖在低温下甜度会增加,它会给人以清凉愉悦的美感。

很多人以为,果糖不会明显升高血糖,是一种优点,甚至推荐糖尿病人吃富含果糖的食物。但这是一种已经过时的观念。近年来的研究证明,果糖的麻烦很多。它不受胰岛素水平的影响,绕开了食欲控制的机制,不能带来明显的饱腹感,很容易让人吃得过量。尽管不升高血糖,却会进入肝脏直接合成脂肪。如果摄人过多果糖的话,可能会引起胰岛素敏感性下降,并导致脂肪肝的发生。

所以,那些冰过之后喝起来很爽的清凉饮料,千万不要一瓶又一瓶地放心享用。因为或许就在你的畅饮之中,大脑的记忆力正在悄悄地下降。

经常饮用高果糖饮料会给人们带来什么影响?()

A.丧失记忆力

B.记忆力减退

C.提高记忆力

D.降低人体温度

单项选择题