人员乘坐罐笼时应（）依次乘罐。
参考答案：排队
等式两边同时除以同一个不为0的数，等式仍然成立．______． （判断对错）
--- You have moved again? Would you please let me know your _______ address ?
--- No problem.
A．concrete
B．appropriate
C．typical
D．flexible
