具有清热凉血、养阴生津功效的药物是（） A.天花粉、芦根 B.连翘、淡竹叶 C.生地

Twenty-five years ago if you made a trip to the local library and searched for articles on globing warming, you’d probably come up with a few from the leading magazines in the world. As an Internet search on global warming now shows, the subject has become as rooted in people’s mind as Madonna or microwave cooking.

With the possible exception of another world war, a giant planet, or an incurable disease, global warming may be the largest danger to our planet. For decades human factories and cars have sent billions of tons of greenhouse gases into the atmosphere, and the climate has begun to show some signs of warming. If steps are not taken soon to reduce the amount of carbon dioxide sent into the atmosphere, the result could terribly affect human life. We have already seen growing destruction, such as drought and death in Sudan, flooding in Asia, bush fires in Indonesia, and fierce winter storms in central Europe.

The Republic of Maldives is barely above sea level. Its 250, 000 citizens are scattered across 1,200 islands in the Indian Ocean. A strong typhoon could spell the end for the entire country, as sea levels could continue rising. The entire population would have to be moved away as the country disappears under the sea.

The greenhouse effect is a naturally occurring phenomenon that keeps our planet at a comfortable temperature averaging 60°F. Since the mid-nineteenth century, however, carbon dioxide in the atmosphere has increased nearly 30% because of the increased use of fossil fuels to run cars, heat homes and power factories. Without controlling, the amount of carbon-dioxide by 2100 may increase by 30%-150% and could lift the average global temperature by up to 2.5° F the next 50 years.

小题1:.

With the first paragraph, the author intends to       .

A．scold people for not paying enough attention to global warming

B．draw people’s attention to global warming

C．how to search for the articles on global warming

D．point out the serious effect of global warming小题2:.

Global warming could affect human life in the following ways EXCEPT       .

A．producing more greenhouse gases

B．causing more floods

C．making winter storms fiercer

D．starting more bush fires小题3:.

The Republic of Maldives       .

A．has moved away their citizens

B．will be more likely to be destroyed by a strong typhoon than by the rising sea level

C．is mostly likely to be destroyed by the rising sea level

D．will have to move away most of their population小题4:.

. Why is the Republic of Maldives especially mentioned in the passage?

A．Because smaller countries are easier to be affected by global warming.

B．Because seaside countries are in danger of disappearing.

C．Because it’s necessary to rescue a country before the sea level rises.

D．Because the serious result of global warming could end a whole country.小题5:.

. From the last paragraph, we can infer that greenhouse effect       .

A．can only affect the earth in an unfavorable way

B．is something easy to control

C．is caused by human act

D．will be good to us if it remains at a proper level

烷烃的密度随着烷烃分子的增大而增加的，但在（）g/cm³左右时趋于稳定。

A.0.6

B.0.7

C.0.8

D.0.9

上重厂生产的9224型电子称重给煤机称重机构主要由（）个托辊和（）个负荷传感器组成。

想要根据船舶航行的区域设定NAVTEX接收机，需要查找无线电信号书的第（）卷。

A、1

B、3

C、5

D、B+C

离心泵有哪些构件组成？