汽油的热值是4.6×107J/kg，现有汽油500g，如果燃烧其中一半，剩_爱下问搜题

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问题填空题

汽油的热值是4.6×10⁷J/kg，现有汽油500g，如果燃烧其中一半，剩余汽油的热值是______J/kg．一杯水变凉了，它的内能______，比热容______（选填“增大”、“减小”或“不变”）．

答案

根据热值和比热容的概念可知，当汽油烧掉一半以后，剩下的汽油的热值是不变的，一杯水变凉了，水的比热容也是不变的，但是由于水的温度降低了水的内能要变小．

故答案为：4.6×10⁷、减小、不变．

阅读理解

阅读短文，选择正确的答案。

Zhang Peng's uncle lives in Hangzhou. Zhang Peng went there with his parents last Monday. They went

there by train. It was a long trip. He slept on the train. The next morning, he got to Hangzhou. His uncle went

to the train station to meet them. Zhang Peng played with his cousin. He ate good food there. He visited the

West Lake. It was beautiful. He took many pictures. He came back to Beijing yesterday.

1. Where did Zhang Peng go?

A. Beijing

B. Hangzhou

C. Jilin

2. When did he go?

A. Last Tuesday.

B. Last Friday.

C. Last Monday.

3. Did Zhang Peng go by train?

A. Yes, he did.

B. No, he didn't.

C. Yes, he does.

4. What did he do there?

A. He did many things there.

B. He only visited the West Lake.

C. He only ate good food.

填空题

若(ss)=2000H，(BP)=3000H，(SI)=4000H，指令MOV AL，[BP+sI+10H】中源操作数的物理地址是【8】H。