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【单选题】
下列对安装反病毒软件并随时更新病毒库的说法正确的是 ( )A.
在没有发现病毒前，可不更新病毒库
B.
定期进行全盘病毒扫描影响计算机速度，并不是很必要
C.
防病毒软件装的越多越好
D.
反病毒软件可以实时发出警报、主动防御以及解除威胁，保护您的计算机免受攻击
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
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皮皮学刷刷变学霸
举一反三
【单选题】As we watched the panda, we stood still, ______ to one another.A．dared hardly to whisperB．hardly
A.
30. As we watched the panda, we stood still, ______ to one another. A．dared hardly to whisper
B.
hardly daring to whisper
C.
dared not to whisper
D.
not dared whisper
【单选题】留置胸腔闭式引流管的拔管指征正确的是（）
A.
24h引流液<10m1，脓液<50ml< /div>
B.
24h引流液<70mlI脓液<10ml< /div>
C.
24h引流液<50ml，脓液<20ml< /div>
【单选题】--- Where did you spot the murderer? --- It was in the cinema __________ we watched Tran formers that I saw him. I can’t remember when.
A.
that
B.
when
C.
where
D.
on which
【单选题】--We all went to the cinema except you last night. Why didn’t you come? --Because I ______ that movie twice.
A.
have watched
B.
had watched
C.
was watching
D.
would watch
【单选题】留置胸腔闭式引流管的拔管指征正确的是( )
A.
24h引流液<10m1,脓液<50ml< /div>
B.
24h引流液<70ml,脓液<10ml< /div>
C.
24h引流液<50ml,脓液<20ml< /div>
【单选题】听力原文：M: Oh, I'm too sleepy to study. W: Well. Bob, if you hadn't watched that late movie last night, you wouldn't have been so sleepy. Q: What did Bob do last night? (16)
A.
He stayed up late watching a film.
B.
He went to bed very early.
C.
He went to a party.
D.
He stayed up late studying.
相关题目：
【单选题】留置胸腔闭式引流管的拔管指征正确的是（）
A.
24h引流液<10m1，脓液<50ml< /div>
B.
24h引流液<70mlI脓液<10ml< /div>
C.
24h引流液<50ml，脓液<20ml< /div>
【单选题】留置胸腔闭式引流管的拔管指征正确的是( )
A.
24h引流液<10m1,脓液<50ml< /div>
B.
24h引流液<70ml,脓液<10ml< /div>