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问题 选择题

2010年中国传统节日清明节，都江堰千年放水节与三岔湖元年迎水节生生对接，一古一今，一旧一新……碰撞出动人的乐彩与华章。该水利工程是我国古代哪位水利专家修建的[ ]

A．李冰

B．郭守敬

C．郑国

D．大禹

答案

A

选择题
已知集f(x)=
0，x＜0
π，x=0
x+1，x＞0
，则f（f（f（-1）））的值是（　　）
A．π+1B．0C．1D．π
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选择题

—You should tell Kankang that he             to work for the Guangzhou Asian Games.

—I think so, I will tell him on his 15th birthday. [ ]

A. chooses

B. has chosen

C. chose

D. is chosen

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