____是世界上使用人数最多的语言;____是世界上使用范围最广的语言。
如图,有a、b、c三户家用电路接入电表,相邻电路的电线等距排列,则三户所用电线( ).
—The land in the southwest of China is in great need of .—Yes, it hasn't rained for a long time there.