对于科学史学科的建立作出奠基性工作的著名科学史家有萨顿、()、T.库恩和丹皮尔。
参考答案:沃尔夫
_________ smoking, he would not have got cancer in the lung.
A.Was he given up
B.Had he given up
C.Did he give
D.If he gave up
以消费者为对象和以经销商为对象的广告运动的区别?