疱疹性咽峡炎常见的病原体是（） A.腺病毒 B.柯萨奇病毒 C.流感病毒 D.肠病毒

患者男，68岁。慢性支气管炎、肺气肿痛史30余年，肺心痛10年，长期口服氨茶碱。1周前因感冒出现咳嗽、咳痰、气促、无发热，自服氨茶碱和抗生素，症状无缓解，又加用另一种茶碱类平喘药，症状仍然不缓解。体格检查：心率98次min，心律不齐，双肺可闻及细小湿啰音及哮鸣音，下肢水肿。心电图示P波形态不一，平均频率128次/min，心室率96次min，P-P间期、P-R间期不一，QRS波不增宽。

该患者的心电图诊断是（）。

A.二度Ⅱ型房室传导阻滞

B.心室颤动

C.心房颤动

D.紊乱性房性心动过速

E.自律性房性心动过速

F.心房扑动

—The little girl's bedroom is very clean.

—Yes. It’s much ________ than her ________.[ ]

A. clean; brother

B. cleaner; brother

C. clean; brother's

D. cleaner; brother's

阅读理解

    The plan: turn Mars into a blue world with streams and green fields, and then fill it with creatures from

the earth.

    This idea may sound like something from a science fiction, but it is actually being taken seriously by

many researchers.

    This suggests the future for the "red planet" will be the main topic for discussion at an international

conference hosted by NASA this Week. Leading researchers as well as science fiction writers will attend

the event. It comes as NASA(美国宇航局) is preparing a multi-billion-dollar Mars research programme.

    "Turning Mars into a little earth has long been a topic in science fiction," said Dr. Michael Meyer,

NAS A's senior scientist. "Now, with scientists exploring the reality, we can ask what are the real

possibilities of changing Mars."

     Most scientists agree that Mars could be turned into a little earth, although much time and money

would be needed to achieve this goal. But many experts are shocked by the idea.

     "We are destroying our own world at an unbelievable speed and now we are talking about ruining

another planet," said Paul Murdin from the Institute of Astronomy, Cambridge, UK.

     Over the past months, scientists have become increasingly confident they will find Martian life forms.

Europe and America's robot explorers have found the proof that water, mixed with soil, exists in large

amounts on the planet.

     In addition, two different groups of scientists announced on March 28 that they had found signs of

methane(甲烷) in the Martian atmosphere, the gas is a waste product of living creatures and could be

produced by microbes(微生物)living in the red planet's soil.

    But scientists such as Dr. Lisa Pratt, a biologist at Indiana University, say that these microbes will be

put in danger by the little earth project.

    "Before we have even discovered if there is life on Mars, we are talking about carrying out projects

that would destroy all these native life forms, all the strange microbes that we hope to find buried in the

soil," said Dr. Pratt.

    Monica Grady, a planetary scientist at the Natural History Museum, London, shares this view. "We

cannot risk starting a global experiment that would wipe out the precious information we are looking for,"

she said. "This is just wrong".

1. A plan for changing the present state of Mars_________.

A. has been made              

B. will be put into practice

C. has been given up            

D. is being argued about

2. According to the passage, besides scientists, _____are also interested in the future of Mars.

A. the public                      

B. science fiction writers

C. the governments of many countries  

D. news reporters

3. The signs of methane in the Martian atmosphere greatly support the view

    that _______

on Mars.

A. microbes may exist  

B. there may be aliens  

C. water exists

D. there is soil

4. Those who are against the plan are worried that it will ________________.

A. turn Mars into a little earth    

B. not be carried out

C. bring destruction to the planet just as what has happened on the earth

D. cost too much time and money

5. Which of the headlines is the fittest for the passage?

A. Mars Programme-a Disastrous Plan

B. Mars Programme- Each Scientist Has His Own Way

C. Mars Programme-Rising Before Us

D. Mars Programme-Challenge to Mankind

写出能解释下列问题或现象的化学方程式：

（1）铁制容器不能用于盛放硫酸铜溶液。

（2）煤矿的矿井里必须采取通风，严禁烟火等措施。

（3）盛放石灰水的瓶壁上常会出现一层白色固体。

（4）在煤炉的煤层上方常常会看到蓝色火焰。

什么是“形旁（形符、意符）”，它一般起什么作用？