第16题: [单项选择]作为一种特定的研究方式，实验法有着三对基本要素，它们分别是什么？（） A. 自变量与因变量、前测与后测、实验组与控制组 B. 程序与操作、前测与后测、自变量与因变量 C. 实验组与控制组、教师与学生、前测与后测 D. 自变量与因变量、程序与操作、前测与后测 参考答案:A
第17题: [单项选择]Questions 22-25 are based on a talk about salt.In the 16th century, what would happen if a man took more than his share of salt A. He would be hanged. B. He would be put in jail. C. He would get his ear cut off. D. He would be fined. 参考答案:C
