键磨损后，通常都采用（）的方法解决。
A、更换新键
B、旧键重新修复
C、更换键轴
D、修复键轴
参考答案：A
用所给词的适当形式填空。
1. Mr. Li _____ (make) maths so easy when he was a teacher.
2. The supermarket is too _____ (crowd), and I don't enjoy it.
3. Does your sister enjoy _____ (do) homework with you?
4. The Greens _____ (go)to South Africa to watch soccer games last year.
5. The relaxing music made the patient(病人) _____ (feel) better.
20世纪90年代以来，美国进入新经济时代，这种新经济的主要特征是[ ]
A．高速度、低膨胀
B．信息化
C．全球化
D．高膨胀、低失业率
