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【单选题】
当pn结呈现截止状态时,一般p区接( ),n区接( )。A.
正极，负极
B.
负极，正极
C.
正极，正极
D.
负极，负极
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举一反三
【单选题】The white man who was put in prison for trying to __________the headquarters(总部)of the ANC tried to escape but failed.
A.
set up
B.
break up
C.
fire up
D.
blow up
【简答题】短文填词。 I have a dream (梦想). I hope I have an interesting (1)j (工作) when I (2)g up(长大). I work very long and sometimes I work very (3)l but I can make a lot of (4)m . I have my own house. It's beautiful...
【简答题】At the age of ______ King delivered that famous speech called I Have a Dream.
【简答题】I think everyone has a dream. My dream is to have a large home. I don’t like living in the city. So the home is in the country, but not far from the city of Nanjing. On the ground floor, there is a tr...
【单选题】The white man who was put in prison for trying to _____ the headquarters (总部) of the ANC tried to escape but failed. [ ]
A.
set up
B.
blow up
C.
break up
D.
put up
【简答题】Do you have a beautiful dream? I know almost everyone his own dream in his life. The dreams are very important them. The dreams can make them harder. I am in a school now. I do well in all my subjects...
【单选题】于扰素抗病毒的作用机制是:
A.
诱发细胞产生抗病毒蛋白
B.
直接抑制病毒的生物合成
C.
直接抑制病毒的释放
D.
阻碍病毒吸附于敏感细胞
E.
与病毒结合，阻止其脱壳
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