鼠标器与PC机的接口有三种。传统的鼠标器使用RS-232接口，现在用得较多的是______接口和USB接口。
参考答案：PS/2
解析： 该题考查考生对鼠标接口的理解。鼠标器与PC机的接口有三种：传统的鼠标器使用RS-232串行接口(9针D型插头座)；现在用的最多的是PS/2接口，它是一种6针的小圆形接口，优点是可以节省一个常规串口接口，并使鼠标操作具有更快的响应速度；正在兴起的是USB鼠标器，它使用USB通用串行接口，可以与其他 USB设备以菊花链方式进行连接。
根据下列各句句意及所给单词的首字母或汉语意思，在句首写出该单词的正确形式。
2. Fold the letter and put it in an ______ (信封).
3. Any creature who ______ (拥有) one of these rings has great power.
4. He considered that the change could be ______ (有益的) to her health.
5. I was ______ (享有) with a happy childhood, one that most people would want to have.
6. The man was one of the s______ from the earthquake.
7. Whenever you are in trouble, don’t h______ to ask me for help.
8. The situation at Omaha Beach was so bad that the US army commanders thought about a_____
the invasion.
9. Please don’t i______ me when I am talking.
10. In Haiti, new difficulties have a______ after the earthquake.