research有复数形式吗?In the 1970s and 1980s a scientist did some r
3个回答
有复数形式
为了一个问题,一个团队在一个时期做的研究,用单数.
不同团队,不同时期,或就不同课题用多种方法进行的研究,通常用复数
相关问题
in the 1970s和in the 1970's有区别吗?
in the 1970s和in the 1970's有区别吗,还有怎么读?
The great scientist became world-known in the early 1970s,__
in the mid-1980s researchers at cleveland改错
in the 1970s和in 1970s 有什么区别
in 1980s in the 1980' in the 1980s on the 1980's的区别
英语短文改错题及答案in the mid-1980s researcher
The event happened ____A in the 1980s B in the 1980's选哪个?
1980S,the 1980,the 1980S,1980'S,1980'有什么区别
是in the 1980's还是in 1980's