According to the research in Passage 1， about 20 hours per week is the safe amount of working time that done not affect school performance significantly.
According to the research in Passage 1， about 20 hours per week is the safe amount of working time that done not affect school performance significantly.
A.正确
B.错误
正确答案：错误
Tag：大学英语
时间：2024-01-05 20:47:02