花卉在萎蔫衰老过程中,其细胞结构发生许多变化,如()等。
A.呼吸作用降低
B.养分供应不足
C.细胞核解体
D.细胞膜变性
E.细胞水分丢失
参考答案:C, D, E
I think the talk given by the old scientist is ______ worth ______.
A.very, to listen
B.well, listening
C.very, to listen to
D.well, listening to