题目

Space is a dangerous place, not only because of meteors (流星) but also because of rays from the sun and other stars. The atmosphere again acts as our protective blanket on earth. Light gets through, and this is necessary for plants to make the food that we eat. Heat, too, makes our environment endurable. Various kinds of rays come through the air from outer space, but enormous quantities of radiation from the sun are screened off. As soon as men leave the atmosphere they are exposed to this radiation but their spacesuits or the walls of their spacecraft, if they are inside, do preve下列实验方案能达到实验目的的是( )实验方案实验目的或结论A将硫酸酸化的H2O2溶液滴入Fe(NO3)2溶液中，溶液变黄色可证明氧化性：H2O2比Fe3+强B向1 mL 1%的NaOH溶液中加入2 mL 2%的CuSO4溶液，振荡，再加入0.5 mL有机物Y，加热，未出现砖红色沉淀说明Y中不含醛基C取a g铝箔与足量氢氧化钠溶液充分反应，逸出的气体通过浓硫酸后，测其体积为V L(已转化为标准状况下)测定铝箔中氧化铝的含量D比较不同反应的反应热数据大小从而判断反应速率的大小