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【单选题】
选择 4-2 、 噬菌体属于下列哪一种病毒类型A.
无脊椎动物病毒
B.
脊椎动物病毒
C.
植物病毒
D.
原核生物病毒
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反馈参考答案：
举一反三
【简答题】Who is describing his or her vacation?Check(√) the correct boxes.
【单选题】--- Hello! Who's that? --- Hi! ______________.
A.
This is Amy.
B.
I'm Amy.
C.
That is Amy.
【单选题】—Hi, Bruce. Here is a letter for you. —Thanks. I wonder .
A.
who the letter was from
B.
who was from the letter
C.
who was the letter from
D.
who from the letter was
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