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【单选题】
路由器工作在OSI模型的A.
网络层
B.
传输层
C.
数据链路层
D.
物理层
手机使用
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反馈参考答案：
举一反三
【简答题】生物节律是指( ),它是由( )控制的。
【单选题】As you are now a member of our society we shall let you ____ our secrets.
A.
into
B.
through
C.
to
D.
between
【单选题】When you come into our school yard, you will notice our beautiful school _____by green trees.
A.
surrounding
B.
surrounded
C.
to surround
D.
being surrounded
【单选题】If our store does not have the parts you need, you may order______through our Web site, and they will be shipped to you at no extra charge.
A.
it
B.
him
C.
them
D.
your
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