皮皮学，免费搜题
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【单选题】
以太网交换机在接收到数据帧时,如果没有在MAC地地表中查找到目的MAC地址,则( )A.
把以太网帧复制到所有端口
B.
把以太网帧单点传送到特定端口
C.
把以太网帧发送到除本端口以外的所有端口
D.
丢弃该帧
拍照语音搜题，微信中搜索"皮皮学"使用
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Bravery is as rare in war as it is in peace. It isn't just a matter of facing danger from which you would ______ to run.
A.
prefer
B.
infer
C.
refer
D.
offer
【简答题】在核算厨房生产人员数量时,如果按照工作量来确定,主要以劳动定额为基础,应重点考虑()厨师。
【单选题】Don’t be nervous. Just speak _______ and pretend the microphone isn’t here.
A.
obviously
B.
slightly
C.
naturally
D.
strangely
【单选题】I suppose that he is just joking, ______?
A.
don't I
B.
isn't he
C.
isn't it
D.
is it
【简答题】It just isn’t fair I was working as a waiter last month my friendswere lying on the beach. . A whenever B.though C.for D.while
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