Conversation One． 听材料，回答下列问题：
A. How to spend summer holiday.
B. How to avoid seasickness.
C. How to prepare for a boat trip.
D. How to deal with vomiting on a sea trip.
查看答案
有一A，B，C三组分的混合物，经色谱分离后，其保留时间分别为：tR(A)=4.5min，tR(B)=7.5min，tR(C)=10.4min，死时间t0=1.4min，求：
According to Galbraith, people feel discontented because ________。
A. public spending hasnt been cut down as expected
B. the government has proved to be a necessary evil
C. they are in fear of another Great Depression
D. materialism has run wild in modem society
Conversation One． 听材料，回答下列问题：
A. To go sightseeing.
B. To have meetings.
C. To promote a new champagne.
D. To join in a training program,
What does the author intend to say by the example in the second paragraph？
A. Some customers simply show no respect to those who serve them.
B. People absorbed in a phone conversation tend to be absent-minded.
C. Waitresses are often treated by customers as casual acquaintances.
D. Some customers like to make loud complaints for no reason at all.
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