空气泡沫（或称空气机械泡沫）灭火的机理是什么？

市场机制是指市场诸要素之间相互联系和作用的制约关系及其调节功能，其核心机制是

A．价格机制

B．竞争机制

C．供求机制

D．激励机制

FIDIC《施工合同条件》规定，承包商租赁施工设备时，应在租赁协议中规定在协议有效期内发生承包商违约解除合同时，设备所有人应( )。

A．运走施工设备

B．以相同的条件将该施工设备转租给发包人

C．更换施工设备

D．暂停施工

阅读理解。

     American beekeeping operations have been hit hard by what scientists call colony collapse

disorder(C.C.D.). Almost half of their worker bees have disappeared during the past season.

C.C.D. has also been reported in Israel, Europe and South America. Bees fly away from the hive

and never return. Sometimes they are found dead; other times they are never found. Many crops

and trees depend on pollination (授粉) by bees to help them grow.

     A new report says virus may be at least partly responsible for the disorder in honey bee colonies

in the United States. This virus is called Israeli acute paralysis virus. It was first identified in Israel

in 2004. Ian Lipkin at Columbia University in New York and a team reported the new findings in

Science magazine. Doctor Lipkin says the virus may not be the only cause. He says it may work

with other causes to produce the collapse disorder.

     The team found the virus in colonies with the help of a map of honey bee genes that was published

last year. They examined thirty colonies affected by the disorder. They found evidence of the virus

in twenty-five of them, and in one healthy colony. The next step is further testing of healthy hives.

     The researchers suggested that the United States may have imported the disorder in bees from

Australia. They say the bees may carry the virus but not be affected.

     The idea is that unlike many American bees, the ability of Australian bees to fight disease has no

t been hurt by the varroa mite(全球性的蜂虱). This insect attacks honey bees, which could make

the disorder more likely to affect a hive. Australian bee producers reject these suspicions.

     And some researchers suspect that bee production in the United States is down mainly because

of the weather. Honey bees gather nectar(花蜜) from flowers and trees. The sweet liquid gives them

food and material to make honey. But cold weather this spring in the Midwest reduced the flow of

nectar in many flowers. Many bees may have starved. Dry weather in areas of the country could

also be playing a part.

     Wayne Esaias is a NASA space agency scientist who keeps bees in his free time. He lives in

central Maryland, where he has found that flowers are blooming a month earlier than they did in

1970, which may be partly responsible for the disorder. Wayne Esaias is organizing a group of

beekeepers to document nectar flow around the country.

1. The researchers found the virus ______.

A. with the help of colony collapse disorder

B. by researching the causes of bee death

C. with the help of a map of honey bee genes

D. with the help of a scientist of NASA

2. What is the passage mainly about?

A. American beekeeping industry has been strongly influenced by the bee disorder.

B. Studies are being carried out on the causes of the bee disorder, but questions remain.

C. How the causes of the bee disorder in U.S have been found.

D. The bee production in U.S is down because of Israeli acute paralysis virus.

3. How many possibilities may be involved in the bee disorder according to the passage?

A. Three.

B. Four.

C. Five.

D. Six.

4. We can infer from the passage that ______.

A. Israeli acute paralysis virus should be responsible for the disorder

B. the solution to the bee disorder will be found eventually

C. American bees are more likely to defend themselves than Australian bees

D. the crop and plant production in U.S may be influenced by the bee disorder

目前我国对商业银行行驶监管职责的机构主要是中国人民银行。

犯罪的间接故意是指行为人明知自己的行为可能发生危害社会的结果，并且放任这种结果发生的心理态度。
下列属于犯罪的间接故意的是( )。

A．甲欲毒杀同事乙，于是在大家共同喝水的饮水机中投毒，乙当天并未从饮水机中取水，但却导致其他三位同事中毒
B．甲欲枪杀乙，在乙家门口伏击，只击中了乙的胳膊
C．出租车司机甲与朋友吃饭时多喝了几杯，但是凭借自己多年的驾驶经验，甲认为不会有什么问题，于是不顾朋友劝阻执意出车，结果撞死了行人乙
D．某医院护士甲将病人乙和丙的药物弄混，到了给乙用药的时间，甲没有仔细核对就拿起应该给丙服用的药物给乙服用，结果因药性不对导致乙死亡