As research techniques become more advanced, the number of animals ______ (use)

游客2024-07-09 25

问题 As research techniques become more advanced, the number of animals ______ (use) in experiments may decrease.

选项

答案 used

解析非谓语动词。分词或分词短语作定语时，如果被修饰的中心词与分词的关系是主动关系，用现在分词；如果被修饰的中心词与分词的关系是被动关系，则用过去分词。[例句] The story described in the book is easy to understand．书中所述故事易于理解。

转载请注明原文地址:http://tihaiku.com/zcyy/3670045.html

相关试题推荐

随机试题

最新回复(0)

Pollutionhasbecomeaseriousprobleminalmostallthebigcitiesofthew