下图是“台湾省地理位置图”，读图回答下列各题。
By the time I got back to school, the bell______.
导体两端的电压为6V，通过导体的电流为0.5A，通电时间为100s，电流做多少功？
在家庭电路中，下列说法错误的是（ ）
There are five people here. __________ there are only four cups.
