填空题

The warming causes population explosions of mosquitoes as well as beetles, but it has been documented that the latter have done more damage to man than the former have.

【参考答案】

NG

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填空题

Water availability in Southern California is determined largely by ______.

填空题

Scientists from many countries agree that the recent warming is caused in part by such human activities as man’s ever-increasing consumption of gas or oil.