当前，条码技术比射频技术应用广泛是因为条码的______。
A．输入速度更快 B．准确性更高 C．采集信息量更大 D．价格更低
参考答案：D
Only then _____ how much damage had been caused. [ ]
A. she realized
B. she had realized
C. had she realized
D. did she realize
（）是指一个组织总的结构层次。
