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【简答题】
为了将含非挥发性杂质的甲苯提纯,在86.0 kPa压力下用水蒸气蒸馏。已知:在此压力下该系统的共沸点为80°C,80°C的饱和蒸气压为47.3 kPa。试求: (1)气相的组成(含甲苯的摩尔分数); (2)欲蒸出100 kg纯甲苯,需要消耗水蒸气多少千克?
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举一反三
【单选题】对丙酮酸激酶缺乏症的患者来说,测定其生理生化指标,以下哪种符合
A.
血红蛋白对 O2 的亲和力下降
B.
红细胞的卸氧量下降
C.
2, 3- 二磷酸甘油酸水平下降
D.
ATP 合成不受影响
【单选题】对丙酮酸激酶缺乏症患者来说，测定其生理生化指标之前，你能预示会发生下列哪种现象______
A.
血红蛋白对氧亲和力升高
B.
血红蛋白对氧亲和力降低
C.
2,3-二磷酸甘油酸水平下降
D.
2,3-二磷酸甘油酸水平不变
【单选题】Try to detect from the author's floating thoughts the central theme of this article.
A.
Divorced parents have more worries about their young adult children than those who stay in their marriage.
B.
Mountain roads with hidden dips and blind turns are especially dangerous for new, young drivers.
C.
Recalling his own teenage experience of driving, the author is ready to see Jesse's growth in his adventures and pleasure of dring
D.
Parents have a hard time adjusting to the growth of their children and their imminent independence.
【单选题】The central theme of Paradise Lost is ( ).
A.
t he creation of man
B.
the fall of man
C.
r esurrection
D.
f inal judgment
【单选题】对丙酮酸激酶缺乏症患者来说,测定其生理生化指标之前,你预示会发生下述哪种现象?
A.
Hb对氧亲和力升高
B.
Hb对氧亲和力降低
C.
2，3-BPG水平下降
D.
2，3-BPG水平不变
【单选题】The central theme of Erikson’s theory of psychosocial stages was the development of ____.
A.
Shame
B.
Conflict
C.
Trauma
D.
Turmoil
【单选题】_____ is the central theme of the English Renaissance.
A.
Realism
B.
Feminism
C.
Humanism
D.
Pessimism
相关题目：
【单选题】对丙酮酸激酶缺乏症患者来说,测定其生理生化指标之前,你预示会发生下述哪种现象?
A.
Hb对氧亲和力升高
B.
Hb对氧亲和力降低
C.
2，3-BPG水平下降
D.
2，3-BPG水平不变
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