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【单选题】There are approximately three quarters of a ton of termites (白蚁) for every person on Earth. It now turns out that these critters may be helping to alter the climate and affect man’s life. For years sc...
A.
It is the production by termites that is now of greater concern.
B.
What scientists worry more about is the output from burning fuels.
C.
The output from burning fuels is now rising steadily.
D.
The burning of fuels generates much less carbon dioxide than termites do.
【单选题】据有关调查，我国中学阶段青少年学生出现苦闷情绪时，除了“闷在心里，不与别人说的学生之外，向伙伴求助者最多，占32%;向父母求助者次之，占13%;向教师求助者最少，只占4%,从这一数据可以看出学生同辈群体对青少年学生的心理健康具有( )
A.
保护功能
B.
缓冲作用
C.
引导作用
D.
发展功能