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【单选题】
ISO/OSI体系结构有几层?A.
2
B.
3
C.
4
D.
5
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反馈参考答案：
举一反三
【单选题】What aspects can nanotechnology be applied?
A.
health
B.
housing
C.
electronic products
D.
All of above
【单选题】What aspects can nanotechnology be applied?
A.
health
B.
housing
C.
electronic product
D.
All of above
【单选题】( )We were walking along the river ________ we heard a cry for help.
A.
because
B.
when
C.
while
D.
if
【简答题】What aspects can cause translation problems?
【单选题】What aspects can nanotechnology be applied?
A.
electronic products
B.
housing
C.
health
D.
All of above
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