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【多选题】
关于血清载脂蛋白AI.B测定,下列叙述中正确的是
A.
目前已有ApoAI.ApoB测定的决定性方法和参考方法
B.
应用5~7个不同浓度的定值血清,采用曲线拟合方式制备校准曲线
C.
对所用抗血清的要求不高
D.
免疫透射比浊法是目前最常用的方法
E.
多用兔抗人或入多克隆抗体制备合适的抗血清
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参考答案:
举一反三
【多选题】形成水合物的条件Conditions for hydrate formation:()
A.
天然气中含有足够的水分Natural gas contains enough moisture
B.
一定的温度与压力A certain temperature and pressure
C.
气体处于脉动、紊流等激烈扰动之中,并有结晶中心存在。Gas is in the pulsation, turbulence and other violent disturbances, and there is a crystallization center
D.
以上都不对
【多选题】输气管中生成水合物的真实情况The real situation of hydrate formation in gas pipeline:()
A.
气体在管内高速度流动,不可能在某一点生成水合物,而往往在数十米的管段上形成水合物。The gas flows in the tube at a high speed, so it is impossible to form hydrate at a certain point.
B.
形成水合物会改变压降曲线形状。Hydrate formation changes the shape of the pressure drop curve.
C.
生成水合物时伴随有热效应,要放出热量。熔解水合物时,要吸收热量。水合物的熔解热为335KJ/kg,对管线温降曲线有影响。The formation of hydrate is accompanied by a thermal effect, to release heat. When you melt hydrate, you absorb heat. The melting heat of hydrate is 335KJ/kg, which affects the temperature drop curve of pipeline.
D.
此外,还有不少难以考虑周全的因素,如:局部阻力、气流漩涡、结晶中心等,因而有些书上只标明水合物的可能形成区。In addition, there are many difficult to consider factors, such as: local resistance, airflow vortex, crystallization center, and so on, so some books only indicate the possible formation area of hydrate.
【简答题】Write down the contents from the Dictaion 1.
【单选题】How many syllables in "hydrate"?
A.
4
B.
3
C.
2
D.
1
【简答题】Dictaion.mp3:
【单选题】Many experts __ a low protein, high carbon hydrate diet.
A.
prompt
B.
advocate
C.
inherent
D.
claim
【单选题】What is the meaning of hydrate?
A.
氢氧化物
B.
二氧化碳
C.
氮气
D.
【多选题】What conditions will natural gas more likely to form hydrate?
A.
Higher pressure
B.
Lower pressure
C.
Higher temperature
D.
Lower temperature
【多选题】The unconventional gas often includes gas hydrate and ( ).
A.
t ight gas
B.
s hale gas
C.
c oalbed methane
D.
c ondensate gas
【简答题】Dictaion
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