淬火的目的是提高金属的（）。
A、塑性
B、硬度
C、韧性
D、可加工性
参考答案：B
具错入组织的果实种子类中药材是
A．五味子
B．槟榔
C．小茴香
D．肉豆蔻
E．枳壳
His daughter ___ his company when he was ill.
A．took out
B．took over
C．took place
D．took up
