在ー项研究中,研究人员试图验证如下假设是否成立:ー个有犯罪倾向的少年如果能经常 得到ー个成人友好热心的忠告,他就有可能避免犯罪。这项实验中的因变量是
A.家庭经济状況
B.忠告
C.犯罪倾向
D.年龄
正确答案是C
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Complete the following sentence with a (compound) word derived from the one(s) given in bracket.
The history students hoped to compare the ( ) of ancient China and Japan. (civil)
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