问题 单项选择题

轮状病毒感染后主要侵犯()

A.十二指肠

B.回肠

C.升结肠

D.空肠

E.乙状结肠

答案

参考答案:D

选择题
[ ]

①有利于营造全民崇尚科技、渴望成才的舆论氛围

②助长了青少年随大流、盲目从众的心理

③有利于引导青少年树立勤奋向上、奉献社会的人生观和价值观

④有利于满足青少年追求新鲜刺激的心理需求

A.②④

B.①③

C.①②

D.③④

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阅读理解

阅读理解。根据要求完成下列各题。

        Mars is the fourth planet from the sun and is commonly known as the Red Planets. The rocks, soil and sky

of it are a little red or pink. Its name was given by the Romans in honor of their god of war.

        People on the earth need oxygen to breathe. There is almost no oxygen on Mars. Living on Mars would be

like living on a very high mountain. There would be little air. It might be 50 degrees above zero at noon and 100

degrees below zero at night. We know that Mars has carbon. Through a telescope, Mars looks red. In some

places, it seems gray. At times the gray turns gray-green, then brown, then gray again. The gray-green may be

a kind of plant color which changes with the seasons.

        Life is expected on Mars by scientists, because there are distinct seasons on the planet's surface. This

condition might support plants. However, some researches find if Mars had life, it must have been a long time

ago. For Mars' first 600 millions years, it had plenty of water and proper temperatures for life. But now the

planet's environment has changed. Mars is not a pleasant place for any form of life.

1. 根据解释,在短文中找出相应的单词或短语。

    ______: famous        ______: sometimes

2. Its name was given by the Romans in honor of their god of war.

(改为主动语态的句子) __________________________________________________________________

3. Why is life expected on Mars by scientists?

(回答问题) __________________________________________________________________

4. There is almost no oxygen on Mars.

(改为反意疑问句) There is almost no oxygen on Mars, _____ _____?

5. But now the planet's environment has changed. Mars is not a pleasant place for any form of life.

(翻译成汉语) __________________________________________________________________