A. The effect of climate change on humans.B. The increase of poisonous gases in the air.C. The increase in the Earth's average temperature. 相关知识点: 试题来源: 解析 C. The increase in the Earth's average temperature. “温室效应”指的是地球大气中某些气体(如二氧化碳、甲烷)吸收和辐射红外...
and in late winter that preceded associated herbage mass rises by about one month. In summary, this research supports a view that the root system of ryegrass is turning over on a continuous basis, like the leaves above ground. The phytomer based model was able to explain much of the ...