导致中国半殖民地化开始的条约是（）；大大加深半殖民地化程度的条约是（）；完全沦为半殖民地的条约是（）。
参考答案：《南京条约》 《马关条约》 《辛丑条约》
微机系统与外部交换信息主要通过( )。
A．输入输出设备
B．键盘
C．光盘
D．内存
His eyes were ____ Della, and there was ____ in them that she could not ____. [ ]
A. fixed on; expression; read
B. fixing upon; expression; believe
C. fixed upon; an expression; find
D. fixed on; an expression; understand
