某一时期内，在一定购买力水平的条件下，充分满足需要的最高普及率是指购买系数。
参考答案：错
-----It is long since we met last. Haven’t you graduated from college yet?
----- _____. I ____ English for 3 years in Lanzhou University.
A．No; study
B．Yes; have studied
C．No; am studying
D．Yes; studied
14时是下午______时，晚上8时用“24时计时法”表示是______时．
