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【单选题】
下列关于反应热的说法正确的是（ ）A.
当△H＜0时，表示该反应为吸热反应
B.
已知C（s）+ 1 2 O 2 （g）=CO（g）△H=-110.5kJ/mol，说明碳的燃烧热为110.5kJ/mol
C.
反应热的大小与反应物所具有的能量和生成物所具有的能量无关
D.
化学反应的反应热只与反应体系的始态和终点状态有关，而与反应的途径无关
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【简答题】What does the author think about the processes of the paperless office environment in com-parison with the paper-full office environment?
【简答题】It is implied that the concept of the paperless office is now adopted on a______scale.
【单选题】If all business goes paperless, at least one million tons of paper will be ______ a year. [ ]
A.
used
B.
saved
C.
copied
D.
offered
【单选题】What does the author mean by 'irony of the information age'?
A.
The dream of the 'paperless' office will be realized.
B.
People usually prefer to have face-to-face meetings.
C.
More digital data use leads to greater paper use.
D.
Some people are opposed to video-conferencing.
【单选题】Questions 下列各are based on the following passage. The 'paperless office' has earned a proud place on lists of technological promises that did not come to pass. Surely, though, the more modest goal of h...
A.
It is the key to paperless office.
B.
It will be replaced by the computer soon.
C.
It is more troublesome than the computer.
D.
It can hardly survive in the digital age.
【单选题】______the paperless management is widely used now, some important files are still kept as hard copies.
A.
Although
B.
When
C.
Because
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