问题
单项选择题
光电传感器中使用的半导体器件是利用了半导体的（）。
A、光敏性
B、导通性
C、热敏性
D、力敏性
答案
参考答案：A
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光电传感器中使用的半导体器件是利用了半导体的（）。
A、光敏性
B、导通性
C、热敏性
D、力敏性
参考答案：A
I was shopping at my local supermarket, as I normally have for years. One particular day, I had done about 2 weeks worth of shopping and 36 toward the register to pay for my groceries. After the cashier had scanned my items and I had bagged them up, she stated that the 37 was $150. I 38 into my back right pocket to grab the money to pay and noticed that there was no money there. I started to get 39 . I knew my pocket book was in the car and I was sure I had put the 40 in my back right pocket. I looked at the cashier with wet eyes and a 41 look not knowing what to do. There were people behind me on the line. She told me to speak with the courtesy counter (爱心柜台). I 42 and said, “Really? It's 43 , no one would hand that in!” But she 44 me to. “You never know…” she said. I decided that there was no 45 in checking so I walked up to a woman behind the counter and said “I have to ask, did anyone 46 cash by any chance?” She asked “How much?" My face then 47 . “$200 in the form of one hundred dollar bills.” I replied. She said, “ 48 , yes, someone did!" I was so 49 ! “Who? I want to thank her.” She pointed to a young girl about 10 years old and says, “She did.” I walked over to the mom and hugged her. She said, “It wasn't me, it was my 50 ” . I said “I know, I wanted to thank you both, 51 she found it ... it's because of you that I got this back.” I was so happy, I was almost in tears. The next day at work, a person in another department 52 me tickets to the circus. He handed me 5 tickets. Almost 53 that young girls face popped (突然出现) in my head. After work I went back to the supermarket and stopped at the courtesy counter and asked if she had any idea who that woman was. She smiled and said, “Yes, She is a friend of mine”. Then I asked her to do me a favor and pass along these 5 tickets to her. She told me that the family of the little girl who found my money were not rich so they would really 54 this. She also said that they had 3 children, so five was the 55 number of tickets!
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