题目

某同学的测量记录中忘了写单位，请替他补上：某一同学的身高为1.63 物理课本的宽度为18.18一枚壹元硬币的厚度约为2.4 一辆小汽车在高速公路上的正常速度约100 答案：【1】m【2】cm【3】mm【4】km/hIt was in 1969 ______ two Americans went to the moon by spaceship.A．whenB．thatC．at that timeD．just then