黄河水能资源最丰富的河段是[ ]
A．上游
B．中游
C．下游
D．第三阶梯河段
答案：A
In daily life，we often use bodylanguage to ________ extra meaning.[ ]
A．broadcast
B．predict
C．convey
D．email
长沙市的市树是什么？
