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【简答题】
在半导体中同时存在 和 两种载流子参与导电。
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反馈参考答案：
举一反三
【简答题】汽车配件网络营销方案建设可利用的有效资源有 、 、 。
【多选题】犬病毒性肝炎给实验研究带来影响有（）。
A.
犬发病和死亡，造成实验中断
B.
改变机体的酶系统和免疫反应性，影响实验研究的正常进行
C.
对实验人员造成危害
D.
对所有温血动物染病
【单选题】China has a lot of coal and oil, and it is rich in other rare minerals______.
A.
as well
B.
also
C.
either
D.
neither
【简答题】阅读理解。 People invented poetry as they helped to remember things. Before the invention of writing, there was no other way but(除了)to remember important things. People early founded that rhyme and rhythm(...
【单选题】Which of the following statements about Sparrows research is CORRECT?
A.
We remember people and things as much as before.
B.
We remember more Internet connections than before.
C.
We pay equal attention to location and content of information.
D.
We tend to remember location rather than the core of facts.
【简答题】You had better not to go out now. It ( ) (rain) heavily.
【单选题】You had better to go now, or you will miss the bus.(改错题)
A.
to go
B.
or
C.
will
D.
miss
【单选题】--- Daddy, I don’t want to go to Jimmy’s birthday. --- You had better go. ____ you make a promise, you have to keep it.
A.
Once
B.
Even if
C.
Unless
D.
In case
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