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【判断题】
手机外壳是压延成型制品。A.
正确
B.
错误
手机使用
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反馈参考答案：
举一反三
【单选题】When you use the ping command to send ICMP messages across a network, what's the most common request/reply pair you'll see? (Select one answer choice)
A.
Echo request and Echo reply
B.
ICMP hold and ICMP send
C.
ICMP request and ICMP reply
D.
Echo off and Echo on
E.
None of the above
【单选题】If you want to lose weight, you should not take such food ______ really necessary.
A.
as is
B.
as it is
C.
as it was
D.
as was
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