A)sketch
B)rough
C)preliminary
D)draft
正确答案:D答案:D
[试题分析]名词辨析题。
[详细解答]所填词要与动词intr oduce搭配,所以,填入draft,符合句意。故答案为D。

A)sketch
B)rough
C)preliminary
D)draft
正确答案:D上一篇 What should a driver do when ascending?A) Rise slowly. B) Breathe faster. C) Relax com
下一篇 What happens to nitrogen in body tissues if a diver ascends too quickly?A) It forms bu