题目
答案解析
查看更多优质解析
举报
make up of
eg.We think of a nucleus as make up of neutron and proton.
be composed of
eg.Concrete is composed of cement,sand and gravel mixed with water.
解析看不懂?免费查看同类题视频解析
查看解答
更多答案(4)
相似问题