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【单选题】
细胞内的遗传物质主要分布在细胞什么结构()。A.
细胞核
B.
细胞质
C.
核糖体
D.
有色体
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举一反三
【单选题】Look at the handsome boy.He is ______brother.
A.
Tom and Jack
B.
Tom and Jack's
C.
Tom's and Jack's
D.
Tom's and Jack
【单选题】— Wow, isn't this handsome device the most popular iPad 2? Can I have a look at it? — _______. [ ]
A.
No, you can't
B.
Sorry, it is expensive
C.
Yes, go ahead
D.
Of course, it looks good
【简答题】请简述光纤的传输原理。
【简答题】Look at the __________ (policeman). How handsome they are!
【简答题】新生儿败血症国内最常见的病原菌为()，其次是()。
【单选题】--Wow, isn’t this handsome device the most popular iphone5? Can I have a look at it? --______.
A.
No, you can’t
B.
Sorry, it’s expensive
C.
Of course, it looks good
D.
Yes, go ahead
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