“苏门四学士”中最为出色的词人是（）
参考答案：秦观
产品在其生命周期中的哪一个阶段成本降到最低值，利润达到最高水平（）。
Great changes have taken place in that school. It is no longer _______ it was 20 years ago, _______ it was so poorly equipped.
A．that; which
B．what; when
C．what; which
D．which; that
