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【单选题】
如何划分文体?前人的分类标准各有道理。书信赠序这类文体是( )A.
按语言形式来分的
B.
按内容来分的
C.
按应用范围来分的
D.
按时代来分的
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举一反三
【单选题】He appears ______ a long time. He is impatient for my arrival.
A.
to wait
B.
to be waiting
C.
to have waited
D.
to have been waiting
【简答题】试分别从导电的机制与能带的观点说明什么是本征半导体、N型半导体和P型半导体。
【单选题】George appears______a hard time convincing his employer that he is right over it.
A.
having
B.
to be having
C.
to have
D.
having had
【单选题】California appears to benefit most from daylight saving time because ___________.
A.
the weather there is windy
B.
it is close to the Pacific Ocean
C.
people there tend to stay outdoors later
D.
people there have more time to do exercise
【判断题】If time appears in the lead of a news story, it typically appears after, not before, the who and what .
A.
正确
B.
错误
【简答题】什么是本征半导体?什么是杂质半导体?以示意图表示它们的能带结构。说明半导体是如何导电的。
【简答题】D The future of agriculture must achieve several goals at the same time. First, it now appears that we will have to double world food production in the next 40 years due to population growth, increasi...
【单选题】----- It appears that your relationship with Mike is not normal, doesn’t it? ----- I thought of him as a trustworthy friend _____, to my shock, he gave me away to the boss．
A.
unless
B.
since
C.
for
D.
until
【单选题】For most people, fat is a burden. It doesn't really matter where it appears, we just don't want it. But it turns out that our bodies also make a unique form. of fat tissue that behaves remarkably unli...
A.
All the people don't like fat at all.
B.
All fat is a kind of tissue storing excess energy.
C.
Brown fat has a unique function that any other fat issue doesn't have.
D.
Brown fat can provide a new way to lose weight.
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