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【判断题】
在绝热刚性容器内发生H 2 (g)+Cl 2 (g)=2HCl(g)反应，因反应后温度升高，故△U＞0。A.
正确
B.
错误
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皮皮学刷刷变学霸
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【单选题】为防止计算机硬件突发故障或病毒入侵的破坏,对于重要的数据文件和资料应 ( )
A.
做定期备份，保存在软盘或优盘中
B.
保存在硬盘中
C.
加密保存到硬盘中
D.
压缩后保存到硬盘中
【单选题】You money in the first half of this month, and have to some from others.
A.
run out; borrow
B.
use up; borrow
C.
run out; lend
D.
use up; lend
【单选题】为防止计算机硬件突发故障或病毒入侵的破坏,对于重要的数据文件和资料应 __
A.
保存在硬盘中
B.
加密保存到硬盘中
C.
做定期备份，保存在软盘或优盘中
D.
压缩后保存到硬盘中
【单选题】George Bernard Shaw, the greatest British dramatist (居作家) of the first half of the 20th century, was born in Dublin, Ireland. His father was a man who drank too much and could not support his family p...
A.
Bernard Shaw's father drank too much.
B.
Bernard Shaw's mother enjoyed music and her children.
C.
Bernard Shaw received little love from his mother when he was young.
D.
Bernard Shaw's two sisters received little love and attention from their parents when they were young.
【判断题】During the first half of the 19th century, the first heroic inventor was John Hall who invented the cotton gin in 1794, which was a machine designed to remove the seeds from cotton and it made the cot...
A.
正确
B.
错误
【单选题】People move from the first stage of sleep to the second and third stags in half an hour or so.
A.
Right
B.
Wrong
C.
Not mentioned
【单选题】为防止计算机硬件突发故障或病毒入侵的破坏,对于重要的数据文件和资料应()。
A.
做定期备份,保存在软盘或优盘中
B.
保存在硬盘中
C.
加密保存到硬盘中
D.
压缩后保存到硬盘中
【单选题】为防止计算机硬件突发故障或病毒入侵的破坏,对于重要的数据文件和资料应( )。
A.
压缩后保存到硬盘中
B.
保存在硬盘中
C.
加密保存到硬盘中
D.
做定期备份,保存在移动硬盘或优盘中
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