A：巨噬细胞
B：T细胞
C：B细胞
D：效应B细胞
下面各图中∠1和∠2是对顶角的是（ ）
Hello! I'm Dolly. ①I work at a hospital. ②I'm a nurse. My house is not far from the hospital. ③So I walk to work.④And my brother is a teacher.⑤He goes to work by car.
①____ ②____ ③____
④____ ⑤____
A. How does he go to work?
B. Where do you work?
C. What does your brother do?
D. How do you go to work?
E. What do you do?
①减缓人口老龄化压力
②促进经济持续健康发展
③促进家庭幸福与社会和谐
④控制和减少老龄人口数量
