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     Climate change could make much of the world too hot for human habitation (居住)

within just three centuries, according to some scientists.

     These scientists found that rising temperatures in some places mean humans would

be unable to adapt or survive. "' It would begin to occur with global - mean warming

of about 7℃, calling the habitability of some regions into question," the researchers

wrote in a paper.

     With 11-12℃ warming, such regions would spread to include the majority of the

human population as currently distributed. Professor Steven said there was no chance

of the earth heating up by 7℃ this century, but there was a serious risk that the

continued burning of gas and coal could create the problem by 2300. "'There's

something like a 50/50 chance of that over the long term," he said.

     The study, which examined climate change over a longer period than most other

research, looked at the "heat stress" produced by combining the influence of rising

temperatures and increased humidity (湿度).

     Professor Steven said climate change research had been "short-sighted" not to

realize the long-term consequences of the influence of greenhouse gases blamed for

global warming. "It needs to be paid attention to," he said. "There's not much we can

do about climate change over the next two decades but there's still a lot we can do

about the longer term changes." "Near 2300, we may be faced with temperature

increases of 12 degrees or even more," Professor Tony Michael said." If this happens,

our current worries about sea level rise, occasional heat waves and bushfires,

biodiversity (生物品种) loss and agricultural difficulties will appear in front of us -- as

much as half the currently inhabited globe may simply become too hot for people to

live there. "

1. Which of the following statements is supported by Professor Steven?______

A. The earth will heat up by 7℃ this century.

B. Burning of fuel adds to the earth's heating.

C. We may be faced with temperature increases of 12 degrees.

D. Climate change would not stop until 2100.

2. From the underlined part in Paragraph 5 we learn that Professor Steven______

A. thinks scientists should do more research on climate change

B. doesn't think we can do anything to avoid global warming

C. believes we can do much to prevent the longer term changes

D. wishes to examine climate change over a longer period

3. The author mainly wants to tell us that _____.

A. the human population is not distributed properly

B. large parts of the earth may be too hot for humans to live on by 2300

C. greenhouse gases are to blame for global warming

D. human beings will die out three centuries later

狭义的社会福利包括（）

A、教育事业

B、医疗卫生事业

C、残疾人福利

D、城市住房事业

简述以下一段HTML代码中各对标记的作用。

企业资本公积金的主要来源是( )。

A．资本(或股本)溢价

B．资产折价差额

C．拨款转入

D．税后利润

E．股权投资准备