in the 1970s和in 1970s 有什么区别

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和in 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和in the 1970's有区别吗,还有怎么读?这两种说法都可以 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 in 1900s 和 in the 1900s那个对? in 1960's 和in the 1960s的区别 in 1720s和in the 1720s的区别 in the 1980s,in the 1980's和in 1980s的区别 in the 19th 和in the 1980's 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 1990s,in the 1990's和in 1990的区别 in the 1970s 世纪前要加the吗? in the 1970s是什么意思为,什么用the in 1990 和 in the 1990s的区别