问题 解答题

人类所必需的六大类营养成分中,对淀粉、蛋白质、脂肪、水、无机盐和维生素六种营养成分来讲,不需要消化能直接被吸收的三种养分是______、______、______.上述六种养分各有重要的功能,为了满足身体生长发育的需要,我们日常饮食中应注意______.

答案

人类需要六类营养物质,即糖类、脂肪、蛋白质、水、维生素、无机盐,其中前三者属于大分子物质,不能通过细胞膜进行循环系统,也就是不能被直接吸收,而水、维生素、无机盐是小分子物质,可以通过细胞膜进入循环系统即被直接吸收.不能被直接吸收的需要把大分子变成小分子,才能穿过细胞膜进入循环系统,也就是消化,淀粉的最终消化产物是葡萄糖,蛋白质的最终消化产物是氨基酸,脂肪的最终消化产物是甘油和脂肪酸.上述六种养分各有重要的功能,人体的生长发育需要各类营养物质,因此我们应该科学的安排一日三餐,均衡的搭配各种食物,不偏食不挑食,做到合理膳食.

故答案为:水;无机盐;维生素;合理膳食.

阅读理解

阅读理解。

     Barack Hussein Obama has made history by becoming the first African-American president in American

history.

     Barack Obama was born in Hawaii on August 4, 1961. His parents separated when he was two years old

and later divorced (离婚). Obama grew up with his mother in Hawaii, and for a few years in Indonesia. Later,

he moved to New York, where he graduated (毕业) from Columbia University in 1983. Obama met his wife,

Michelle Robinson, in June 1989 and married her on October 3, 1992. The couple's first daughter, Malia Ann,

was born in 1998, followed by a second daughter, Natasha ("Sasha"), in 2001.

     Obama's success is a true milestone (里程碑). It tells of a fact that in America you really do get a chance

to do anything if you have the talent and ability and you work hard enough.

     Obama didn't take office until 20 January, 2009. As a president, he has to face many serious challenges,

including two foreign wars, climate change and what he has described as "the worst financial crisis in a

century". But Obama himself is busy dealing with these challenges.

1. How old was Barack Obama when he became American president?

A. 48

B. 40

C. 37

D. 31.

2. Obama's success tells us that _____.

A. anyone can become president if he works hard

B. black people can achieve anything if they have talent

C. everyone can succeed if he is lucky enough

D. a talented person can succeed if he works hard enough

3. What does the underlined phrase "make history" in the first paragraph mean?

A. 编造历史

B. 创造历史

C. 杜撰历史

D. 改造历史

4. According to the passage, Obama has to face the following challenges except _____.

A. climate change

B. financial crisis

C. population problem

D. foreign wars

5. The whole passage is mainly about Obama's _____.

A. success

B. family

C. education

D. experience

单项选择题