问题 单项选择题 B1型题

高原环境下工作应增加的营养素()。

A.糖类

B.维生素D

C.镁

D.脂肪

E.叶酸

答案

参考答案:A

解析:1.叶酸能预防巨幼红细胞性贫血。 2.糖类氧化提供能量时需氧量较低。 3.低温环境下工作应增加脂肪的供应量。

填空题
阅读理解

阅读理解。

     About six years ago I was eating lunch in a restaurant in New York City when a woman and

a young boy sat down at the next table, I couldn't help overhearing parts of their conversation. At

one point the woman asked: "So, how have you been?" And the boy-who could not have been

more than seven or eight years old-replied. "Frankly, I've been feeling a little depressed lately."

     This incident stuck in my mind because it confirmed my growing belief that children are changing.

As far as I can remember, my friends and I didn't find out we were "depressed" until we were in high

school.

     The evidence of a change in children has increased steadily in recent years. Children don't seem

childlike anymore. Children speak more like adults, dress more like adults and behave more like

adults than they used to.

     Whether this is good or bad is difficult to say, but it certainly is different. Childhood as it once

was no longer exists, Why?

     Human development is based not only on innate (天生的) biological states, but also on patterns

of access to social knowledge. Movement from one social rote to another usually involves learning

the secrets of the new status. Children have always been taught adult secrets, but slowly and in stages:

traditionally, we tell sixth graders things we keep hidden from fifth graders.

     In the last 30 years, however, a secret-revelation (揭示.  machine has been installed in 98 percent

of American homes. It is called television, Television passes information, and indiscriminately (不加

区分地), to all viewers alike, be they children or adults. Unable to resist the temptation, many children

turn their attention from printed texts to the less challenging, more vivid moving pictures.

     Communication through print, as a matter of fact, allows for a great deal of control over the social

information to which children have access. Reading and writing involve a complex code of symbols

that must be memorized and practices. Children must read simple books before they can read complex

materials.

1. According to the author, feeling depressed is ________.

A. a sure sign of a psychological problem in a child

B. something hardly to be expected in a young child

C. an inevitable has of children's mental development

D. a mental scale present in all humans, including children

2. Traditionally, a child is supposed to learn about the adult world ________.

A. through contact with society

B. gradually and under guidance

C. naturally and by biological instinct

D. through exposure to social information

3. The phenomenon that today's children seem adult like is attributed by the author to ________.

A. the widespread influence of television

B. the poor arrangement of teaching content

C. the fast pace of human intellectual development

D. the constantly rising standard of living

4. Why is the author in favor of communication through print for children?

A. It enables children to gain more social information.

B. It develops children's interest in reading and writing.

C. It helps children to memorize and practice more.

D. It can control what children are to learn.

5. What does the author think of the change in today's children?

A. He feels amused by chair premature behavior.

B. He thinks it is a phenomenon worthy of note.

C. He considers it a positive development.

D. He seems to be upset about it.