蒸发系统保持一定的真空度,有利于保持一定的有效温差,与蒸发总温差无关。

题型:判断题

问题:

蒸发系统保持一定的真空度,有利于保持一定的有效温差,与蒸发总温差无关。

考点:蒸发工考试蒸发工综合练习蒸发工综合练习题库
题型:判断题
Napoga Gurigo,a 12-year-old girl,lives in a village in Ghana. It is   1  for her family to get clean drinking water. The nearest place to get water is a muddy (混浊的) water hole half a kilometer away from her   2 . Animals and villagers use it alike. Each morning, Napoga leaves home at half past five to collect water for her family. Sometimes it   3  a few hours to get enough water. Napoga has no time to go to school for learning. In the neighboring areas, many boys and girls   4  Napoga. They can't keep strong and   5  just because they have not enough drinking water.
In fact, 70% of Earth's surface is water. But most of   6  is sea water. We can't use salty water in our daily life. Fresh water is what we __7__ drink, take showers and cook food. And fresh water covers only 1 percent of Earth's surface. In some areas people try to make deep wells (水井) to get water from   8 . But there still   9  enough for farming. Scientists say that 10  30 years, more people in the world will face all kinds of water problems than now. So we must do something to take care of our water resources (资源).
小题1:
A.easyB.hardC.funD.impossible
小题2:
A.schoolB.cityC.countryD.home
小题3:
A.spendsB.costsC.paysD.takes
小题4:
A.look likeB.are likeC.feel likeD.sound like
小题5:
A.healthyB.strongC.heavyD.clean
小题6:
A.themB.thoseC.thatD.these
小题7:
A.used toB.are used toC.use toD.are used
小题8:
A.underground B.subwayC.riversD.the sea
小题9:
A.haven'tB.isn'tC.aren'tD.hasn't
小题10:
A.inB.afterC.beforeD.for
题型:判断题

2004年7月4日美国国庆日,布什总统向中国网民发表谈话。他说:“人类千万年的历史,最为珍贵的不是令人炫目的科技,不是浩瀚的大师们的经典著作,不是政客天花乱坠的演讲,而是实现了对统治者的驯服,实现了把他们关在笼子里的梦想。因为只有驯服了他们,把他们关起来,才不会害人。我现在就是站在笼子里向你们讲话。”美国实现“驯服”的手段是

A.自由、民主的精神

B.权力制衡

C.实行民主选举总统

D.道德的制约

题型:判断题

将乳糜血浆放置4℃环境中过夜次晨观察血浆出现“奶油样”上层,说明下列何种脂蛋白增多

A.CM
B.VLDL
C.LDL
D.HDL
E.LP(a)

题型:判断题

公司信贷客户市场细分的方法中,按照产业生命周期的不同,可划分为新兴产业和夕阳产业()

题型:判断题

人体的转动形式?

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