糖尿病饮食治疗原则错误的是
A. 糖类占总热量的50％～60％
B. 脂肪占总热量的30％
C. 蛋白质占总热量的30％
D. 蛋白质至少l／3来自动物蛋白
E. 三餐摄入量分别占总摄入量的比例：l／5、 2／5、2／5
Why does the author mention so many events in Paragraph 12？
A. To show that migration exerts a great impact on population change.
B. To illustrate that migration contributes to mankind"s progress.
C. To reveal that migration is generally associated with great occurence.
D. To explain that migration may not be accompanied by human conflicts.
A．Business courses have become popular.B．The school only offers business courses.
A. Business courses have become popular.
B. The school only offers business courses.
C. The business school has a new program.
D. The school has just started to offer business courses.
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