（1）800；（2）810；（3）210；（4）220
If she ________ medicine earlier, she _______ ill now.
A．takes; won’t be
B．took; wouldn’t be
C．had taken; wouldn’t have been
D．had taken; wouldn’t be
钢按用途分类，可分为（）。
A．碳素钢和合金钢
B．沸腾钢和镇静钢
C．结构钢和工具钢
