皮皮学，免费搜题
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【单选题】
链路状态路由协议使用( )作为度量值。A.
跳数
B.
代价值
C.
CPU的利用值
D.
链路的负载
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【单选题】It is Dad's birthday and we _________ for a meal to celebrate. [A] have gone out [B] were going out [C] are going out [D] have been going out
A.
have gone out
B.
were going out
C.
are going out
D.
have been going out
【简答题】According to the author, how can companies be ethical in business?
【简答题】以下哪种推荐最为靠谱：
【单选题】Sam suggested __________ for a walk after supper because it’s good for health. A. to go out B. that going out C. go out D. going out
A.
to go out
B.
that going out
C.
go out
D.
going out
【单选题】有A、B、C三本书，至少读过其中一本的有20人，读过A书的有10人，读过B书的有12人，读过C书的有15人，读过A、B两书的有8人，读过B、C两书的有9人，读过A、C两书的有7人。三本书全都读过有多少人？（ ）
A.
5
B.
7
C.
9
D.
无法计算
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