英语题目.速回答1.The ___the air is from the ground ,the ___the air is ( )A higher up ;thinner B.lower ;thinner C higher up;denser 2.What gas is give off when an object is burnt ?( )A.Carbon dioxide B. Oxygen C.Hydrogen 3.Which statement is w
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英语题目.速回答1.The ___the air is from the ground ,the ___the air is ( )A higher up ;thinner B.lower ;thinner C higher up;denser 2.What gas is give off when an object is burnt ?( )A.Carbon dioxide B. Oxygen C.Hydrogen 3.Which statement is w
英语题目.速回答
1.The ___the air is from the ground ,the ___the air is ( )
A higher up ;thinner B.lower ;thinner C higher up;denser
2.What gas is give off when an object is burnt ?( )
A.Carbon dioxide B. Oxygen C.Hydrogen
3.Which statement is wrong ?( )
A.Plants are important to life .B .Animals and man cannot live without plants .
C. Plants can make food only from air and water .
英语题目.速回答1.The ___the air is from the ground ,the ___the air is ( )A higher up ;thinner B.lower ;thinner C higher up;denser 2.What gas is give off when an object is burnt ?( )A.Carbon dioxide B. Oxygen C.Hydrogen 3.Which statement is w
1.A 海拔越高,空气越稀薄.
2.A 物品在燃烧时释放二氧化碳.
3.C 植物只能从空气和水中获取食物,是错误的,还有土壤等.
这原来不是英语题,是生物化学啊.
1.A 空气离地面越远越稀薄
2.A 当物体燃烧后释放的气体是二氧化碳
3.C 植物仅仅从空气和水中获取食物。是错误的
1A 2 A 3C
A A C