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【多选题】
源于例 1 ,下列说法正确的是
A.
第一次冲入氮气前，高压瓶内氧气的分压po2=0.2p0
B.
第一次冲入氮气后高压瓶内氧气的分压，根据分压的定义式判断没有发生变化仍是0.2p0
C.
第一次冲入氮气后高压瓶内氧气的摩尔分数可由分压yO2= Po2/ pmix=0.2/4
D.
以上均不正确，该题不能用分压定律来解决
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参考答案：
举一反三
【判断题】The guest doesn’t pay the bill.
A.
正确
B.
错误
查看完整题目与答案
【单选题】What and how should a waiter/waitress do if a guest doesn't understand some charge on his/her bill and ask for an explanation?
A.
Get the manager to deal with the guest
B.
Explain the charge in a patient way.
C.
Explain the charge reluctantly.
D.
Insist that the bill doesn't spot a mischarge.
查看完整题目与答案
【单选题】When a guest check in, he doesn’t need to show __________.
A.
ID card
B.
passport
C.
credit card
D.
name card
查看完整题目与答案
【单选题】IPv4 地址、IPv6 地址和MAC地址分别用多少二进制位表示?
A.
32，128，64
B.
32，64，48
C.
32，128，48
查看完整题目与答案
【单选题】We will go for a picnic if it _____ tomorrow. [     ]
A.
doesn't rain
B.
wasn't rainy
C.
won't rain
D.
wasn't raining
查看完整题目与答案
【判断题】The guest doesn’t like fish
A.
正确
B.
错误
查看完整题目与答案
【单选题】听力原文：WA That's SO annoying! I just bought this expensive printer, but it doesn't come with the USB cable I need to connect it to my computer. Now I have to go BACK to the computer store just to get th...
A.
Her printer is not working.
B.
Her printer frequently runs out of ink.
C.
Her new printer did not come with a cable.
D.
Her new printer is now available at a lower price.
查看完整题目与答案
【判断题】A walk-in guest is a guest who doesn′t make a reservation at our hotel.
A.
正确
B.
错误
查看完整题目与答案
【单选题】下列关于有机物的说法不正确的是
A.
乙烯和苯可以用石油和煤为原料制得，它们均能使溴水褪色，但褪色的原理不同
B.
糖类、油脂、蛋白质都能发生水解反应，且均属于高分子化合物
C.
用饱和Na 2 CO 3 溶液能除去乙酸乙酯中混有的乙酸和乙醇杂质
D.
研究表明禽流感病毒H7N9在沸水中两分钟就能被杀死，是因为病毒所含蛋白质受热变性
查看完整题目与答案
【单选题】What does the woman mean?
A.
The clerk doesn’t like to be bothered．
B.
The machine was just repaired．
C.
She Can teach the man to operate the machine．
D.
The man shouldn’t make any more copies．
查看完整题目与答案
相关题目：
【判断题】The guest doesn’t pay the bill.
A.
正确
B.
错误
查看完整题目与答案
【单选题】What and how should a waiter/waitress do if a guest doesn't understand some charge on his/her bill and ask for an explanation?
A.
Get the manager to deal with the guest
B.
Explain the charge in a patient way.
C.
Explain the charge reluctantly.
D.
Insist that the bill doesn't spot a mischarge.
查看完整题目与答案
【单选题】When a guest check in, he doesn’t need to show __________.
A.
ID card
B.
passport
C.
credit card
D.
name card
查看完整题目与答案
【单选题】IPv4 地址、IPv6 地址和MAC地址分别用多少二进制位表示?
A.
32，128，64
B.
32，64，48
C.
32，128，48
查看完整题目与答案
【单选题】We will go for a picnic if it _____ tomorrow. [     ]
A.
doesn't rain
B.
wasn't rainy
C.
won't rain
D.
wasn't raining
查看完整题目与答案
【判断题】The guest doesn’t like fish
A.
正确
B.
错误
查看完整题目与答案
【单选题】听力原文：WA That's SO annoying! I just bought this expensive printer, but it doesn't come with the USB cable I need to connect it to my computer. Now I have to go BACK to the computer store just to get th...
A.
Her printer is not working.
B.
Her printer frequently runs out of ink.
C.
Her new printer did not come with a cable.
D.
Her new printer is now available at a lower price.
查看完整题目与答案
【判断题】A walk-in guest is a guest who doesn′t make a reservation at our hotel.
A.
正确
B.
错误
查看完整题目与答案
【单选题】下列关于有机物的说法不正确的是
A.
乙烯和苯可以用石油和煤为原料制得，它们均能使溴水褪色，但褪色的原理不同
B.
糖类、油脂、蛋白质都能发生水解反应，且均属于高分子化合物
C.
用饱和Na 2 CO 3 溶液能除去乙酸乙酯中混有的乙酸和乙醇杂质
D.
研究表明禽流感病毒H7N9在沸水中两分钟就能被杀死，是因为病毒所含蛋白质受热变性
查看完整题目与答案
【单选题】What does the woman mean?
A.
The clerk doesn’t like to be bothered．
B.
The machine was just repaired．
C.
She Can teach the man to operate the machine．
D.
The man shouldn’t make any more copies．
查看完整题目与答案
参考解析：
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