题目

完形填空；阅读下列短文，从每小题所给的A、B、C、D四个选项中选出最佳选项。 Living in another country can be very lonely. Last year I went to a middle school in America. I had no friends there. I was  1  alone, and sometimes I felt like I was the only person in the world. One Monday, our teacher   2   a boy into the classroom and told us, “This is Terry King, your new classmate.” He was tall and fat, and when he  3  ,his eyes turned into a line. He was always smiling, and it seemed like he had no  4  .  Terry took the seat next to me. Then 搓手能使手的温度升高，这是用________的方法使手的内能增加；使用电热水器给水加热，这是用________的方式使水的内能增加，把质量为2 Kg，初温是30℃的水加热到80℃，这些水吸收的热量是________J，(水的比热容是4.2×103 J/(Kg℃)