题目

听下面一段独白，回答以下小题。【1】How long did it take to build the Golden Gate Bridge?A.Three years. B.Four years. C.Seven years.【2】What must you bring with you if you decide to visit the Bridge?A.A camera. B.A bike. C.A jacket.【3】How many bridges are longer than the Bridge?A.Four. B.Eight. C.Twelve.【4】What is true about the Bridge according to the speaker?A.It’s not worth visiting now. B.It’s still a famous attraction in the world.C.It’s the oldest bridge of its kind in the world.先化简，再求值：，其中x是方程的根。