两次PUSCH信道闭环功控间的命令字数量可以是（）。 A.1次 B.2次 C.6次

滑阀式换向阀的操纵方式有（）。

A.手动换向阀

B.机动换向阀

C.电磁换向阀

D.液动换向阀

E.电液动换向阀

（2012•绍兴）对于天宫一号目标飞行器内镍氢电池的总反应式H₂+2NiO（0H）═2Ni（OH）₂，下列叙述不正确的是（　　）

A．H₂是单质　　

B．Ni0（0H）是氧化物　　

C．Ni（OH）₂中Ni化合价为+2价　　

D．参加反应的H₂、NiO（OH）的质量比为1：92

In Yemen, you always see one type of vehicle on the road: the water truck.They travel mountain roads and cross deserts to bring Yemenis the goods more valuable than oil.It is one that only the rich can afford, with the supply regularly being cut off.Others must rely on scarce rain or charity to  fight thirst.

Experts say Yemen is going to be the first country in the world to run out of water.The capital, Sanaa, will run out of drinking water as early as 2025，says a report by the World Bank.

Hannan, an 18­year­old from Lahej, said that only the rich could prepare for cuts in supply.“In a good week we’ll have a water supply all week but then the following week there will be water only for a day or two, ” she said.

She and her husband, a factory worker, pay 3,000 riyals (99 yuan) for a week’s supply of water from a touring water truck when the taps run dry.With an income of only 20,000 riyals (660 yuan) a month，this means the family often spend half their money on water.

“There are a lot of people who can’t afford it and they have to rely on their neighbors to help，” she said.

The average person in Yemen survives on one­fifth of what the World Health Organization considers to be enough water.

In Taiz, in the south，tap water is available only once every 45 days.In the mountainous Malhan district in the north，women and children climb a 1,500­m mountain to collect water from a spring, often in the small hours to avoid long queues.

Yemen is located in Southwest Asia，bordering the Arabian and Red Sea.Yemeni people have lived on scarce water supplies for thousands of years but that problem has been made serious by conflict in the area，the fast­growing population and the use of water to grow a drug called qat.With one of the world’s highest rates of population growth—3.46 percent, Yemen is the poorest Arab country.

The government is considering desalinating (淡化) seawater，but this would be expensive and it may now be too late.The only other solution is to cut down on farming, but that means importing even more food.

小题1:The passage aims to________.

A．analyze the reasons why Yemen lacks water

B．suggest some solutions to the water issue in Yemen

C．present how serious the water problem is in Yemen

D．encourage the world to help Yemenis who are suffering from water shortages小题2:When Hannan said that only the rich could prepare for cuts in supply，she meant that________.

A．rich people drank more water than the poor

B．rich people could buy water from the water trucks if there was a water supply cut

C．she had a rich neighbor who often helped her during water supply cuts

D．the rich were not affected by water supply cuts小题3:Which of the following may be a reason why Yemen is short of water?

A．The country has had no rain for a long time.

B．The population of Yemen is growing fast.

C．The government has failed to reduce farming.

D．People can’t afford the water from government water trucks.小题4:The best title for the passage is “________”．

A．Never take water for granted

B．The water truck—the commonest sight in Yemen

C．The first country to run out of water in the world

D．No water for Yemen

关于行业风险分析的说法，正确的是( )。

A．行业风险分析的目的是识别同一行业中所有企业所面临的主要风险

B．然后评估这些风险将会对行业的未来信用度所产生的影响

C．波特五力模型是行业分析和行业风险评估的重要方法

D．行业风险分析框架是行业分析和行业风险评估的重要方法

E．行业风险分析是指由于一些不确定因素的存在，导致对某行业生产、经营、投资或授信后偏离预期结果而造成损失的可能性

宏观调控