2010年9月1日，我国正式实施手机用户__________制度。[ ] A．不

设计信息报表，并能为下级职业指导人员提供工作指导

B

If you have a bottle of water recycled 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 see 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 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. Scientists say that the recycled water is thousands of times better than the water from a city tap(水龙头).

50. 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

51. 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

52. 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

53. Which of the following sentences is TRUE?

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

急性心肌梗死合并心源性休克的主要表现为（）

A.血压不变，中心静脉压下降

B.血压下降，四肢干燥、温度低

C.双下肢水肿，颈静脉怒张

D.血压下降，肺毛细血管楔压上升

E.血压下降，心率增快

“拍卖法律关系当事人之间应自觉履行委托拍卖合同、拍卖成交确认书中所约定的各自的义务，以保证拍卖活动的顺利进行。”这是拍卖基本原则中( )原则的内容。

A．公开

B．公平

C．公

D．诚实信用

二次出血常发生于( )。

A．动脉

B．静脉

C．毛细血管

D．实质器官

E．以上均可