题型:选择题 While our city tries impatiently to change its appearance by tearing down old buildings, more and more citizens are suggesting ways to ___________ the historically important architectureA.decorateB.developC.preserveD.reserve 查看答案
题型:读图填空题 观察下面所给的三幅图片,回答相关问题。(1)A中含_________较多,B中含__________较多,C中含________较多。(2)这三类物质都是构成_________的主要成分,并且能为生命活动提供_________。 查看答案