某学校的物理仪器室要安装一个电铃，要求高中物理办公室和初中物理办公室的教师都能控制电铃的发声，且物理仪器室的实验员还能判断是哪个办公室在呼叫．
（1）除电铃外你认为还需要补充的其它器材有：
（2）在虚线框内画出一个设计电路图．
由题意可知，两开关并联，电铃位于干路，一支开关串联一个灯泡或两个开关均串联一个灯泡；
方法一、
（1）器材：灯L、开关S1和S2、电源、导线；
（2）设计的电路图：
方法二、
（1）器材：灯L1和L2、开关S1和S2、电源、导线；
（2）设计的电路图：
答：方法一和方法二中的任意一个均可．
I shook hands with my father in the truck, and for a long time he looked straight ahead and didn’t say a word. But I knew he was going to say a little to me. “I can’t tell ,” he finally said. “I never went to college, andnone of your went to college. I can’t say don’t do this and do that, everything is different. And I don’t know is going to come up. I can’t help much with money, , but I think things will work out. ”
He gave me a new check-book(支票簿). “If you are short of money, a small check. But when you write one, send me a letter and let me how much. There are some things we can always sell.” In four years all the checks I wrote were less than a thousand dollars. My part-time jobs such as to the blind student and sitting with the teachers’ kids filled in the financial gaps.
“You know what you want to be, and they’ll tell you what to take,” my father went on. “When you get a job, be sure it’s honest, and work hard.”
Then my dad reached down beside his seat and brought the old, Bible that he had read so often. He didn’t say read this every morning. He just said, “This can help you if you will let it.”
Did it help? I got through college being a burden on the family. I have been able to make money since.
| 小题1: | A．everything B．anything C．nothing D．something |
| 小题2: | A．sister B．mother C．brothers D．father |
| 小题3: | A．so B．if C．when D．because |
| 小题4: | A．that B．what C．which D．whom |
| 小题5: | A．too B．also C．either D．as well |
| 小题6: | A．write B．borrow C．buy D．sell |
| 小题7: | A．to know B．knew C．knowing D．know |
| 小题8: | A．read B．reading C．to read D．writing |
| 小题9: | A．beautiful B．fine C．broken D．complete |
| 小题10: | A．without B．by C．during D．with |