A:甲属于人口稳定型国家,乙属于人口衰退型国家
B:甲属于人口增长型国家,乙属于人口稳定型国家
C:甲属于人口增长型国家,乙属于人口衰退型国家
D:乙属于人口衰退型国家,乙属于人口稳定型国家
—Bill doesn't know how to improve his Chinese. Could he ask you for some _______?
—Of course.
复数2-i2+i= ( )
9×7____7×9
16+5____6×4
2×9+6____6×5-4
—Jack, please don't play the CD, or please ________. Father is sleeping.— OK. No problem.