题目

植物花青素在碱性环境中显蓝色，中性环境中显紫色，酸性环境中显红色。牵牛花的花瓣在清晨是红色的，与此显色有关的细胞代谢反应式主要是 A．ATPADP + Pi +能量 B．C6H12O62C3H6O3 +能量 C．C6H12O6 + 6O2 + 6H2O6CO2 + 12H2O + 能量 D．CO2 + H2O（CH2O）+ O2 答案：C根据句意，用所给动词的适当形式填空。1.Walking into a blue room makes it easier (feel) calm.2.Amy hurried to leave home without ________ (say) goodbye to anyone.3.The teacher told us that the earth ________(move) around the sun.4.She （practise）colour therapy since she left college.5.—Where’s Miss Yang?—Look, she __________ (talk) with her students over there.