Plastics___many other materials.A.has taken the place of B.have taken place of
问题描述:
Plastics___many other materials.A.has taken the place of B.have taken place of
答
B 复数
答
A
此处塑料指的是塑料这一大类材料,是整体,故动词用单数.其中包括许多塑料种类(所以用复数)