单项选择题

A．The ultimate content remains the same.
B．The vitamin content is reduced.
C．The food becomes poisonous.
D．Vitamin is added to the food.
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单项选择题
A．Working students in general suffer a drop in grades.B．Working students are better able to cope with difficulties in life.C．Working students in general have their grades improved.D．Working students have a better chance of finding a job after graduation.
A．Working students in general suffer a drop in grades.
B．Working students are better able to cope with difficulties in life.
C．Working students in general have their grades improved.
D．Working students have a better chance of finding a job after graduation.
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