实验课上四位同学连接的电路如图所示，他们中连接错误的是（　　）

如果你在一平面镜中看到了另一个同学的眼睛，那么无论这平面镜多么小，该同学也一定会通过这平面镜看到你的眼睛，这是因为（　　）

   The early history of the city of Rome involves Romulus and Remus，two orphan boys who，legend says，were raised by a she-wolf．The boys'mother had been murdered by an evil king and the two babies tossed into the river Tiber．When the wolf found them they had washed up on the shore．She perhaps took pity on the crying of the babies and，gently picking them up in her teeth，she carried them back to her cave and fed them on her milk．The boys grew bigger and stronger and，eventually，were found by a herdsman who took them home．He and his wife raised the boys like their own children．When they reached manhood they sought revenge on the king who had killed their mother and driven them from their home．
   They decided to build a city．Unfortunately，they argued over the appropriate site and Romulus killed his brother Remus．Romulus ruled this city — called Roma — for thirty-seven years．
   The city of Rome is one of the most popular tourist attractions in the world．If you travel there you can see a statue of the two baby boys feeding from their mother - the wolf．