曲线图法可评价（）。
A.发育水平和趋势
B.发育速度与趋势
C.发育水平、速度与匀称程度
D.发育水平与体型
E.发育水平、速度与趋势
参考答案：E
—Would you please tell me something about your travel in London?
—____.
A．Excuse me. I’m afraid not
B．It’s very nice of you to say so
C．Certainly. I’ll be glad to
D．No, I don’t like it
化简：y3（y3）2﹣2（y3）3=( )
