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【多选题】
As to the definition of poetry, there’re numerous different arguments. Which one is your favorite saying in the following sentences?
A.
William Wordsworth: Poetry is the spontaneous overflow of powerful feelings: it takes its origin from emotion recollected in tranquility.
B.
Daniel Defoe : Justice is always violent to the party offending, for  every man is innocent in his own eyes.
C.
Dylan Thomas: Poetry is what makes me laugh or cry or yawn, what makes my toenails twinkle, what makes me want to do this or that or nothing.
D.
T.S. Eliot: Poetry is not a turning loose of emotion, but an escape from emotion; it is not the expression of personality, but an escape from personality. But, of course, only those who have personality and emotions know what it means to want to escape from these things.
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【单选题】某蒸发器用以增浓50%质量的NaOH水溶液,加热用饱和温度为160ºC的饱和蒸汽,已知常压下50%的NaOH水溶液的沸点为140ºC,当冷凝器真空度为53kPa此温度下,纯水的饱和温度为80ºC。如忽略液面高度且杜林规则适用,则传热温度差为()。
A.
30 ºC
B.
40 ºC
C.
50 ºC
D.
60 ºC
【单选题】已知温度为27°C,则真空度 pa下1 cm3空气内的分子数的数量级
A.
/m3
B.
/m3
C.
/m3
D.
/m3
【简答题】已知温度为27°C,则真空度1.33×10 -10 pa下1 m 3 空气内的分子数的数量级
【单选题】已知温度为 27°C ,则真空度 1.33×10 -10 pa 下 1 cm 3 空气内的分子数的 数量级
A.
10 10 /m 3
B.
10 6 /m 3
C.
10 9 /m 3
D.
10 8 /m 3
【简答题】.以胰蛋白酶原的激活过程为例说明酶原激活的实质与酶原存在的生物学意义.
【简答题】已知水的三相点温度和压力分别为273.16K和610.5Pa。若将冻结的蔬菜放入不断抽空的真空蒸发器中,使蔬菜中的冰升华以生产干燥蔬菜,则T、p控制的范围是 (A) T>273.16K,p>273.16K    (B) T>273.16K (C) T<273.16K,P>610.5Pa    (D) T<273.16K,p<610.5Pa
【简答题】温度为T时,在容积为V(dm 3 )的真空容器中充入N 2 (g)和Ar(g),容器内压力为a(kPa)。已知N 2 (g)的分压为b(kPa),则Ar(g)的分压为______kPa;N 2 (g)和Ar(g)的分体积分别为______和______;N 2 (g)和Ar(g)的物质的量分别为______和______。
【单选题】某水泵出厂时额定流量下的允许吸上真空高度为4.5m,已知当地大气压为9.6mH2O,水温30℃时的饱和蒸汽压力为0.43mH2O,则该泵安装在此地,其实际允许吸上真空高度为()m。
A.
3.58
B.
3.77
C.
4.31
D.
4.50
【单选题】已知温度为27°C,则真空度1.33×10-10 pa下1 m3空气内的分子数的数量级
A.
10 10 /m 3
B.
10 6 /m 3
C.
10 9 /m 3
D.
10 8 /m 3
【简答题】以胰蛋白酶原的激活过程为例说明酶原激活的实质与酶原存在的生物学意义 .
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