问题
选择题
—When ______ his friend ______ back from America?
—Two weeks ago. [ ]
A. did, come
B. is, come
C. was, come
D. does, come
答案
A
搜题请搜索小程序“爱下问搜题”
—When ______ his friend ______ back from America?
—Two weeks ago. [ ]
A. did, come
B. is, come
C. was, come
D. does, come
A
根据下列统计表回答下列问题
中国总人口、劳动年龄人口、老年人口及抚养系数变动趋势
|
2050年我国劳动力人口数量与老年人口数量的比值为( )。
A．1.2
B．1.8
C．2.7
D．4.9