下列气体中，不属于温室气体的是（）
A.二氧化碳
B.甲烷
C.一氧化碳
D.氟利昂
参考答案：C
—Excuse me, could you please tell me if the sports meeting ________ on time?
—Hard to say. If it ________ tomorrow, we’ll have to put it off.
A．will hold; rains
B．will be held; rains
C．will be held; will rain
D．holds; will rain
影响孵化的因素是什么？
