阻塞高压应具备以下条件：（1）中高纬度高空有闭合（）中心存在；（2）暖高至少维持3天

If you have a bottle of water recycled(再利用) from urine(尿), would you drink it? Astronauts at the ISS may soon do so.

NASA(美国航空航天局) said it would use a high-tech machine to recycle wastewater at the ISS. The machine will recycle water for washing hands, shower water, water for brushing teeth and even urine to make drinking water. It will save millions of dollars each year.

At present, each ISS astronaut uses about 4.4 liters(升) of water every day. It costs about 24 million dollars a year to send water up to the ISS. A liter of water costs about $ 11,000.

The machine will be sent to the ISS later. NASA hopes it will recycle about 93% of all the water used on the station.

Will the water be clean? Different chemicals will be put in the wastewater. The water will be heated to 130℃ to kill bacteria(细菌). Scientists say that the recycled water is thousands of times better than the water from a city tap.

小题1:NASA will use a high-tech machine to recycle wastewater at the ISS to ______.

A．protect the ISS

B．make the astronauts work harder

C．provide better water and food for the astronauts

D．save the cost of sending water up to the ISS小题2:At present it costs NASA about ______ dollars to transport water up to an astronaut at the ISS a day.

A．4.4 thousand

B．11 thousand

C．48.4 thousand

D．24 million小题3:Scientists plan to get rid of bacteria in the wastewater by ______.

A．freezing

B．heating

C．shaking

D．precipitating(沉淀)小题4:The passage mainly tells us something about ______.

A．water recycling at the ISS

B．the International Space Station

C．a high-tech machine

D．the cost of NASA小题5:Which of the following sentences is TURE?

A．The recycled water is much better than that from a city tap.

B．The high-tech machine will recycle all the water used on the station.

C．The ISS astronauts use more water than us.

D．The high-tech machine can only recycle urine to make water.

肝脏左叶的分叶是（）

A.内侧及外侧叶

B.左外上及外下段

C.头侧部及尾侧部

D.尾叶及方叶

E.上侧叶及下侧叶

测定乙型肝炎病毒表面抗原的亚型有助于

A．病原学诊断

B．流行病学调查

C．评定传染性大小

D．确定抗病毒治疗措施

E．判断预后

银行向出口单位提供有追索权的融资服务的，银行可以在向出口单位提供融资资金并按规定为出口单位办理结汇或入账手续后，以融资金额为准向出口单位出具出口收汇核销专用联。

（）连同有关的文档资料称为计算机软件。

A.数据；

B.程序；

C.程序和数据；

D.操作系统。