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【单选题】
下列说法正确的是（ ）A.
某液体的摩尔质量大于18g/mol，则该物质的密度一定比
B.
同温同压下，分别将充满HCl、NO 2 的两支试管倒立于蒸馏水中足够长时间，假设不考虑溶质的扩散，两支试管中溶液的物质的量的浓度之比为3：2
C.
将90%硫酸溶液和10%硫酸溶液等体积混合，其质量分数小于50%
D.
c mol/L的KCl溶液的密度为d g/mL，则此KCl溶液的质量分数为 ×100%
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【简答题】In this section we present several performance figures for ....
【单选题】SECTION A CONVERSATIONS Directions: In this section you will hear several conversations. Listen to the conversations carefully and then answer the questions that follow. 听力原文：Man: We are having a deba...
A.
The popularity of advertisement.
B.
The function of advertisement.
C.
The ways of advertisement.
D.
Benefits of advertisement.
【单选题】In this section, we present several performance figures for ....
A.
Introduction
B.
Related work
C.
Results
D.
Discussion
【单选题】—Excuse me. I want to buy some stamps. Where can I find a post office? —I know _______ is not far from here. You can easily find _______.
A.
that; it
B.
it; one
C.
one; it
D.
that; one
【单选题】SECTION A CONVERSATIONS Directions: In this section you will hear several conversations. Listen to the conversations carefully and then answer the questions that follow. 听力原文：Man: Hew! This rowing is ...
A.
They are visiting a lighthouse.
B.
They are rowing a boat.
C.
They are lightening a candle.
D.
They are having lunch.
【单选题】In this section, we simply ________ the ideas behind it.
A.
hide
B.
hold
C.
introduce
D.
nteract
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