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【单选题】
DNS缓存中毒属于( )A.
假消息攻击
B.
信息收集型攻击
C.
利用型攻击
D.
拒绝服务攻击
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举一反三
【单选题】Part I Short conversation. Short conversation. Listen to five short conversation and choose the best answer to each question you hear. 1.mp3:
A.
Call the secretary again at 10 today.
B.
Make another appointment.
C.
Express his thanks for the call.
D.
Cancel the meeting with the secretary.
【单选题】Listen to a short passage and choose the best answer to each question you hear.
A.
Because black cats look like witches.
B.
Because black cats were thought to be witches.
C.
Because black cats bring seven years of bad luck.
D.
Because black cats are hard to notice in darkness.
【单选题】Listen to a short conversation and choose the best answer to each question you hear.
A.
He will apologize to his roommate.
B.
He will give the bicycle back right now.
C.
He will give a call to the woman tonight.
D.
He will play computer games with his roommate.
【简答题】反映材料抵抗破坏的强度能力称为材料的（）
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