问题
填空题
电弧具有两个特性，即能放出（）和（）。
答案
参考答案：强烈的光；大量的热
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电弧具有两个特性，即能放出（）和（）。
参考答案：强烈的光；大量的热
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| Yesterday when my son and I were eating dinner, I saw a policewoman walking past our house. A woman with a 1 look was following her. I opened the 2 , went out and asked if everything was OK. The policewoman said that the woman's 3 had gone missing (失踪) an hour earlier. I said that we hadn't seen the girl, but we could 4 . I explained to my son that we couldn't finish our 5 right then. He said, "Be a kind person, Dad." We got in our car and 6 the girl all over the town. Along the way, a group of children were playing. 7 they heard what had happened, they said they would help 8 . They rode their bikes and joined us. 9 the little girl was found safe a few miles away. I was so 10 to see many people help a stranger. It is a nice world. | |||
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