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举一反三
【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】像妈蚁、蜜蜂等社会性昆虫的群聚生活，个体之间有明确的分工，同时又通力合作，共同维护群体的生存。它们相互之间是 ______的关系。
A.
种内互助
B.
互利寄生
C.
摘食
D.
竞争
【单选题】像蚂蚁、蜜蜂等社会性昆虫的群聚生活、个体之间有明确的分工，同时又通力合作，共同维护群体的生存。它们相互之间是_______的关系。
A.
竞争
B.
互利寄生
C.
摘食
D.
种内互助