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【简答题】
人工降雨时，执行任务的飞机在高空投撒“干冰”（固体二氧化碳），“干冰”进入云层，从周围______大量的热，很快______为气体，使空气的温度急剧下降，高空中的水蒸气就______成小冰粒，这些小冰粒逐渐变大下降，遇到暖气就熔化为雨点落到地面．
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参考答案：
举一反三
【单选题】催化二氧化碳和氨合成氨甲酰磷酸反应的酶及分布是（ ）。
A.
氨甲酰磷酸合成酶I，细胞液
B.
氨甲酰磷酸合成酶I，线粒体
C.
氨甲酰磷酸合成酶Ⅱ，细胞液
D.
氨甲酰磷酸合成酶Ⅱ，线粒体
【单选题】It’s generally agreed that the greatest threat facing the world today is the warming of the earth’s atmosphere, commonly called global warming or the greenhouse effect. But what is the cause of the gr...
A.
It’s generally agreed that the greatest threat facing the world today is the warming of the earth’s atmosphere, commonly called global warming or the greenhouse effect. But what is the cause of the greenhouse effect
B.
We have been producing too many of the gases which, when they are released into the earth’s atmosphere, trap heat, and thus raise their temperatures. There are several gases involved, but the main ones are carbon dioxide (二氧化碳) and chlorofluorocarbons (氯氟甲烷)--often called CFCs. The carbon dioxide comes from burning forests and from bunting fossil fuels such as oil and coal. The CFCs are given off by refrigerators and air-conditioning systems. Carbon dioxide is to blame for 56% of the greenhouse effect, and CFCs for 23%.
C.
The global warming we are experiencing now is only a result of the carbon dioxide and other gases we have dumped into the atmosphere up to the 1960s. In other words, the damage may have already been done. Temperatures are expected to increase by at least 1.3 Celsius degrees by 2030 and 3 degrees by the year 2070.
【多选题】二氧化碳对呼吸的调节是通过（）
A.
直接刺激呼吸中枢
B.
刺激颈动脉体和主动脉体
C.
加强牵张反射
D.
刺激延髓化学敏感区
E.
刺激外周呼吸肌
相关题目：
【单选题】催化二氧化碳和氨合成氨甲酰磷酸反应的酶及分布是（ ）。
A.
氨甲酰磷酸合成酶I，细胞液
B.
氨甲酰磷酸合成酶I，线粒体
C.
氨甲酰磷酸合成酶Ⅱ，细胞液
D.
氨甲酰磷酸合成酶Ⅱ，线粒体
【单选题】It’s generally agreed that the greatest threat facing the world today is the warming of the earth’s atmosphere, commonly called global warming or the greenhouse effect. But what is the cause of the gr...
A.
It’s generally agreed that the greatest threat facing the world today is the warming of the earth’s atmosphere, commonly called global warming or the greenhouse effect. But what is the cause of the greenhouse effect
B.
We have been producing too many of the gases which, when they are released into the earth’s atmosphere, trap heat, and thus raise their temperatures. There are several gases involved, but the main ones are carbon dioxide (二氧化碳) and chlorofluorocarbons (氯氟甲烷)--often called CFCs. The carbon dioxide comes from burning forests and from bunting fossil fuels such as oil and coal. The CFCs are given off by refrigerators and air-conditioning systems. Carbon dioxide is to blame for 56% of the greenhouse effect, and CFCs for 23%.
C.
The global warming we are experiencing now is only a result of the carbon dioxide and other gases we have dumped into the atmosphere up to the 1960s. In other words, the damage may have already been done. Temperatures are expected to increase by at least 1.3 Celsius degrees by 2030 and 3 degrees by the year 2070.
【多选题】二氧化碳对呼吸的调节是通过（）
A.
直接刺激呼吸中枢
B.
刺激颈动脉体和主动脉体
C.
加强牵张反射
D.
刺激延髓化学敏感区
E.
刺激外周呼吸肌
参考解析：
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