光盘存储器是一种利用( )技术进行存储信息的设备。
A) 半导体 B) 电子C) 脉冲 D) 激光
参考答案:D
解析: 光盘存储器是一种利用激光技术进行存储信息的设备。
His efforts to raise money for his program were ________ because no one showed any intention to take
a cent out of their pockets. [ ]
A. in place
B. in sight
C. in effect
D. in vain
论述工商行政管理的职能转变。