Carbon dioxide, which makes a ______ between us and the sun, prevents heat from getting out of the atmosphere easily, so the earth is becoming warmer.
A．difference B．comparison C．connection D．barrier
高三英语单项填空中等难度题
(2013·湖北，22)Carbon dioxide, which makes a________between us and the sun, prevents heat from getting out of the atmosphere easily, so the earth is becoming warmer.
A．difference B．comparison
C．connection D．barrier
高三英语单项填空中等难度题查看答案及解析
Carbon dioxide, which makes a ______ between us and the sun, prevents heat from getting out of the atmosphere easily, so the earth is becoming warmer.
A．difference B．comparison C．connection D．barrier
高三英语单项填空中等难度题查看答案及解析
Carbon dioxide, which makes a ________ between us and the sun, prevents heat from getting out of the atmosphere easily, so the earth is becoming warmer.
A．difference B．comparison
C．connection D．barrier
高三英语单项填空中等难度题查看答案及解析
(2013·高考湖北卷)Carbon dioxide，which makes a________between us and the sun，prevents heat from getting out of the atmosphere easily，so the earth is becoming warmer.
A．difference B．comparison
C．connection D．barrier
高三英语单项填空中等难度题查看答案及解析
Some plants can take in carbon dioxide we breathe out and give ______ oxygen to us.
A. in case B. in turn C. in return D. in addition
高三英语单项填空困难题查看答案及解析
According to Charles Keeling, the amount of carbon dioxide ________ sharply and steadily over the forty years between 1957 and 1997.
A. increased B. had increased
C. had been increased D. was increasing
高三英语单项填空中等难度题查看答案及解析
It is pretty well understood ________ controls the flow of carbon dioxide in and out the atmosphere today.
A．that B．when C．what D．how
高三英语单项填空中等难度题查看答案及解析
It is pretty well understood ________ controls the flow of carbon dioxide in and out the atmosphere today.
A． that B．when C．what D．how
高三英语单项填空中等难度题查看答案及解析
An increased concentration of carbon dioxide and certain other gases in the Earth’s atmosphere ______ global warming.
A. contributing to B. contribute to
C. contributes to D. to contribute to
高三英语单项填空简单题查看答案及解析
More and more carbon dioxide is being released into the air，________the more severe global warming effects.
A．contributed to B．to contribute to
C．contributing to D．to be contributed to
高三英语单项填空中等难度题查看答案及解析