妈妈用电动自行车送小明上学.途中妈妈提醒小明“坐好,别动!”这个“别动”的参照物是 [ ]
A.电动自行车上的座位
B.路旁的树木
C.迎面走来的行人
D.从身旁超越的汽车
A
---How does Jack usually go to work?
---He _____ drive a car, but now he _____ there to lose weight.
A.used to, is used to walk
B.was used to, is used to walking
C.was used to, is used to walk
D.used to, is used to walking
施工作业HSE风险识别,采用的关联图分析法的程序是什么?