单项选择题
A. they didn’t study well B. they didn’t take part in class activities C. they didn’t take notes in class D. they didn’t finish their study that term
A.president B.professor C.teacher D.student
A. the seasonal pattern has an impact on food values B. the seasonal pattern determines a person’s life expectancy C. the seasonal pattern still influences life expectancy even if nutrition improves at all time of the year. D. the seasonal pattern will not change even if nutrition has improved much in modern age