下列做法容易造成意外伤害的是()
①雷雨天时接听电话
②玩弄火柴、打火机
③用潮湿的水触摸电器开关
④穿运动衣上体育课
A、①②③
B、①③
C、②③④
D、①②
参考答案:A
小明骑自行车去外婆家,原计划用5小时30分,由于途中有千米的道路不平,走这段路时,速度相当于原计划速度的,因此,晚到了12分钟,请问小明家和外婆家相距多少千米()
A.33
B.32
C.31
D.34
My sister _____ the League last month and she has decided to _____ the activity to help the aged next week. [ ]
A. joined; join in
B. joined in; join
C. joined; join
D. joined in; join in