题型：名词解释 选词填空。其中有两项是多余的。A.about B. break C. first D. but E. forget F. happyG. smile H. remember I. lonely J. back K. reason L. changed When I was 13 years-old,a boy gave me an important gift. It was a smile. It was the early autumn of my 1._____ year at a junior high school, and my old school was far away. As a result, no one knew who I was.I was very 2_____,and afraid to make friends with anyone. Every time I heard the other students talking and laughing, I felt my heart 3._____.I couldn't talk to anyone about my problem, and I didn't want my parents to worry 4._____ me. Then one day, my classmates talked happily with their friends, 5._____ I sat at my desk unhappily as usual. At that moment, a boy entered the classroom. I didn't know who he was. He passed me and then turned 6._____ He looked at me and, without a word, smiled. Suddenly, I felt the touch of something bright and friendly. It made me feel happy, lively and warm. That smile 7._____ my life. I started to talk with the other students and made friends. Day by day, I became more active and closer to everyone in my class. The boy with the lucky 8._____ has become my best friend now. One day,I asked him why he smiled, but he couldn't 9._____ smiling at me! It doesn't matter cven if he didn't tell me the 10._____ ,because all the dark days have gone. Now I believe that the world is what you think it is. If you think you are lonely, you might always be alone. So smile at the world and it will smile back. 查看答案
题型：名词解释 两个灯泡，L1标有“6V，3W”字样，L2没有标记，测得L2的阻值为6Ω，把它们串联起来接入某一电路中时，它们均能正常发光，那么该电路两端的电压和L2的电功率分别为（ ）A．12伏，3瓦B．12伏，1.5瓦C．9伏，1.5瓦D．9伏，3瓦 查看答案
题型：名词解释 青年未婚男子吴某因一次输血不幸感染了艾滋病。在绝望之余，他来到北京。他利用事先准备好的针筒，先抽取自己的体液，然后再随意的用针筒向行人和游客针刺和注射，引起社会的巨大恐慌。吴某的行为应如何定性( )A．构成传播性病罪B．构成以危险方法危害公共安全罪C．构成传染病菌种、毒种扩散罪D．不构成犯罪 查看答案