根据短文，判断正误。

   Look at this desk. It's Jim's desk. It's brown. Jim's book is on it. It's an English book. His pencil-box is on it, too. His pencil is in his pencil-box. But where's his pen? He can't find it.

居民楼道中照明灯泡正常工作时的电压是____伏，它与控制其亮暗的“声控开关”是____联连接的．家庭电路中的电能表，其示数单位是____．

读长江流域地区图，如图，回答下列问题。