皮皮学，免费搜题
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【判断题】
公众号名不能重复,因为这是公众号登陆凭证,必须是唯一的。A.
正确
B.
错误
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】All flights because of the snowstorm ,many passengers could do nothing but wait.
A.
had been cancelled
B.
were cancelled
C.
have been cancelled
D.
having been cancelled
【简答题】FIRST there were the overhead televisions showing films. Then seatback entertainment screens were introduced. More recently, many airlines have introduced in-flight entertainment services that can be ...
【单选题】All flights ___ because of the snowstorm, many passengers could do nothing but take the train. A. were canceled B. having been canceled C. had been canceled D. have been canceled
A.
选择1
B.
选择2
C.
选择3
D.
选择4
【简答题】IP地址分为几类?其中常用的三类IP地址的第一个字节的数分别是多少?
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