像氯化钾，氯化铵这样氯离子含量较高的肥料，不应长期，大量施用在（）
A.旱地
B.水稻
C.烟草
D.小麦
参考答案：C
"The volleyball must belong to Mary" means_________
A．The volleyball must be Mary
B．Mary has a volleyball
C．The volleyball must be Mary's
D．That can't be Mary's volleyball
钢材的弹性变形是什么意思？
