题目内容
（请给出正确答案）
25℃下纯水的电导率K(H,O)=5.5x10-6s·m-1,同样温度下HCI,NaOH和NaCI的极限摩尔电导率分别为Amm(HCI)=426.16x10-4s·m2·mol-1,Amm(NaOH)=248.11x10-4S.m2·mol-1,
Amm:(NaCl)=126.45x10-4S·m2·mol-1.则纯水的解离度a=().
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A.Q、W、E、R、T、Y、U、I
B.A、S、D、、F、G、H、J、K
C.A、S、D、F、J、K、L
D.E、R、T、Y、U、I、O、P
2
(g)达到平衡.此时,向反应系统中加入一定量的惰性组分H2O(g),则标准平衡常数Kθ(),C6H5C2H5(g)的平衡转化率α(),C6H5C2H3(g)的摩尔分数y(C6H5C2H3)().(选择填入:增大、减小、不变.)
A.1.3167x105
B.0.1194
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D.8.3732
If you feel a shortage of energy, join our Health Club. Fatigue is common for people to 1）_________ of to their doctors. In such cases, you should take a look at the causes for your tiredness and learn how you can get rid of it. Firstly, if you have to work hard 24 hours a day, seven days a week with high 2)_________, you will feel tired and bored. The 24/7 push to be productive can wear you out both physically and 3)__________. Your can have mini-breaks that will cheer you up and make your routine a little less routine. Secondly, if you sit staring at a screen for long periods of time you tend to blink less frequently and 4)_______your eyes. Your eyes need a break. Stand up once in a while to 5)_________ your legs and arms. Frequent breaks with long 6)__________ to your nearby parks will keep your body active and reduce eyestrain. Finally, gaining as little as five pounds of weight can cause 7)________. Extra weight also puts extra burden on your heart, which makes you tired. You can 8)_________ the habit of eating junk food and 9)___________ yourself to the basics of healthy eating. Try to eat smaller 10)_________ of food. With each pound of weight you lose, you'll feel a rise in energy. A) reverse B) strip C) strain D) empty E) portions F) fatigue G) rides H) emotionally I) reserve J) stretch K) dump L) complain M) collections N) efficiency O) strides
