色彩之间差异小，色彩的对比就强，效果就响亮，色彩之间的关系就疏远；色彩之间差异大，色彩就容易统一，效果就柔和，色彩之间的关系就亲近。
参考答案：错
— If our parents would listen more to us,they would understand us better.
— _______.They just expect us to listen.
A. I believe not
B. No problem
C. Good idea
D. I can't agree more
短波红外加热比对流加热的效率可提高（）。
A．30％
B．40％
C．50％
D．70％
