问题
选择题
— Dick, is Nick your twin brother?
— Yes, and I'm thirty minutes ______ than him. [ ]
A. smaller
B. bigger
C. heavier
D. older
答案
答案：D
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— Dick, is Nick your twin brother?
— Yes, and I'm thirty minutes ______ than him. [ ]
A. smaller
B. bigger
C. heavier
D. older
答案：D
年龄人口与劳动年龄人口的百分比）在50%以下的时期称为“人口红利期”。下图是我国人口抚养比变化图，读图回答1～2题。