下列气体中，能供给动植物呼吸的是( ) A．H2 B．O2 �

下列气体中，能供给动植物呼吸的是( )

A．H₂ B．O₂ C．N₂ D．CO₂

答案

相关题目

细胞膜上与识别、免疫、信息传递和血型决定有密切关系的

细胞膜上与识别、免疫、信息传递和血型决定有密切关系的物质是 A、糖蛋白 B、磷脂 C、脂肪 D、核酸

London: It’s well known that Charles Darwin’s famous theory of evolution (

London: It’s well known that Charles Darwin’s famous theory of evolution (进化) annoyed many people because it was against the Biblical view of creation. But few know that it also created proble

下列关于有机物的说法中，正确的是（）①标准状况

下列关于有机物的说法中，正确的是（）①标准状况下，22.4 L甲醛所含电子数约为16 NA 。②甲醇通常是一种有毒气体，分子中只含极性键③苯酚

下列示意图与对应的反应情况符合的是 �

下列示意图与对应的反应情况符合的是（）A．向含0.01mol KOH和0.01mol Ca(OH)2的混合溶液中缓

She _________ for ten years and now she has a lovely daughter. A. married B

She _________ for ten years and now she has a lovely daughter. A. married B. has been married C. got married D. has married

为比较Fe3+和Cu2+对H2O2分解的催化效果，某化学研究小组的同

为比较Fe3+和Cu2+对H2O2分解的催化效果，某化学研究小组的同学分别设计了如图甲、乙所示的实验。请回答相关问题：（1）定性分析：如图甲

--Who would you like to buy the coat________? -- I’d like to give it to my b

--Who would you like to buy the coat________? -- I’d like to give it to my brother ________ a present. A. for, for B. to, as C. for, as

It is a common theme in many fiction stories that the world may one day be �

It is a common theme in many fiction stories that the world may one day be by insects. A. broken in B. run over C. taken over D. filled in

下列气体中，能供给动植物呼吸的是( ) A．H2 B．O2 �

答案

相关题目

最新题目