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【单选题】
下列关于计算机病毒的描述中,正确的是A.
计算机不清洁会感染病毒
B.
计算机病毒会自我复制
C.
杀毒软件可以清除任何病毒
D.
清除病毒的首选方法是格式化硬盘
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【多选题】丹霞地貌发育在红色砂砾岩地区，为红色砂砾岩在内外营力作用下发育而成的特殊地貌，属于此种地貌的景区有( )。
A.
浙江雁荡山
B.
福建武夷山
C.
广东金鸡岭
D.
云南路南石林
E.
安徽黄山
【单选题】-Why are you so late,Tom? -I was on half the way when it_________to me that I had left my notebook at home,so I had to fetch it. [ ]
A.
occurred
B.
hit
C.
happened
D.
reminded
【单选题】He had learned enough German to _____ a conversation. [ ]
A.
carry out with
B.
carry on
C.
continue on
D.
carry
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