in the 1970s；in 1970s；in 1970's；in the 1970's哪个对?

in the 1970s；in 1970s；in 1970's；in the 1970's哪个对? in 1970、in the 1970、in the 1970‘s、in the 1970s有什么区别 in the 1970s=in the 1970's还是=in 1970's in 1970s; in the 1970's ; in the 1970s'.那种对呀, in the 1970s 的“s”表示什么? in the 1970与 in the 1970s 有什么区别吗?in the 1970 与 in the 1970s 有什么区别吗? in the 1970s 世纪前要加the吗? in the 1970s是什么意思为,什么用the in the 1970s和in 1970s 有什么区别 in the cat,s In the stationary’s in the in the 1720's呢? in the 1970s和in the 1970's有区别吗,还有怎么读?这两种说法都可以 英语翻译In the early 1970s,he succeeded in developing the world’s first high-yield hybrid rice. in 1980/in 1980s / in the 1980 / in the 1980s / in the 1980's/in the 1980' in the late of 1970s great changes took place in china in the 1970s和in the 1970's有区别吗?（2008浙江）_____,Coca-cola began to enter China's market.A.In 1970's B.In 1970s C.In the 1970's D.In the 1970s答案貌似给的是D唉,可是我看到好多地方也有用到C的那种说法呢,各位大 About___of the workers in the factory were born in the___?A.two-thirds;1970s B.two-third;1970sAbout___of the workers in the factory were born in the___?A.two-thirds;1970s B.two-third;1970s