皮皮学，免费搜题
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【单选题】
是由硬件或软件构成,或者是两者兼具的系统,用于检测入侵,防止专用网络内外的未授权访问。A.
加密
B.
防火墙
C.
报警
D.
逻辑炸弹
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
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【简答题】(As long as you clear your desk by this evening), you can have tomorrow off.
【单选题】一般说来,只要空间中有变化的磁场,就会在导体内产生环形电流,称为涡流。这种电流跟我们平常使用的家用电路中的电流是有区别的,其热效应可用于加热物体。下列哪个生活物品是利用这一原理制作而成
A.
微波炉
B.
高压静电除尘
C.
电磁炉
D.
电热水器
【单选题】–Have you taken your medicine today ? --Yes , I ______ it after breakfast.
A.
have taken
B.
took
C.
will take
D.
take
【简答题】Have you ever met with this case in your life you can't understand others even if they have saiHave you ever met with this case in your life ____ you can't understand others even if they have sai...
【简答题】C Can you train your cat to actually use your toilet? Can you not have to deal with litter boxes any more? Well for many people the answers to these questions are yes． You may have heard that some peo...
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