中国关于军控和裁军问题的原则立场。

A. 氨茶碱
B. 异丙托溴铵
C. 沙丁胺醇
D. 西咪替丁
E. 硝酸甘油

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

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.