in the 1960s、in the 1960’s、on the 1960s和in1960s有什么区别?这四个分别是A、B、C、D的选项.A research group first had the idea of linking all the computers togrter______

in the 1960s、in the 1960’s、on the 1960s和in1960s有什么区别?这四个分别是A、B、C、D的选项.A research group first had the idea of linking all the computers togrter______
in the 1960s、in the 1960’s、on the 1960s和in1960s有什么区别?
这四个分别是A、B、C、D的选项.A research group first had the idea of linking all the computers togrter______

in the 1960s、in the 1960’s、on the 1960s和in1960s有什么区别?这四个分别是A、B、C、D的选项.A research group first had the idea of linking all the computers togrter______
选A.其他几种表述不对