语音交换系统接入的电话包括本地供电〔就是磁石电话）和（）电话。
A、中央供电
B、席位供电
C、数字电话
D、模拟电话
参考答案：A
下列照明光源中，何者显色性最佳？
A．荧光高压汞灯
B．高压钠灯
C．荧光灯
D．白炽灯
用所给动词的适当形式填空
1. Please remember (post) the letter when you go to the post office.
2. Nobody____(like) studying all day.
3. Different people have different ____ (look).
4. Li Yuchun is a pop_ (sing).I like her very much.
5. She (say) her mother looks very young.
