关于比热定义说法正确的是（）。A、单位质量某物质升高1℃吸收热

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问题单项选择题

关于比热定义说法正确的是（）。

A、单位质量某物质升高1℃吸收热量叫该物质的比热

B、单位质量某物质降低1℃放出热量叫该物质的比热

C、单位质量某物质升高或降低1℃吸收或放出的热量叫该物质的比热

D、热量与比热是同一概念

答案

参考答案：C

填空题

根据句意及词首字母或汉语提示，补全单词。

1. Don’t forget to send an e-mail to me. The a_________ is happy@sina.com.

2. Animals are our good friends. We should p_________ them.

3. I’m not sure w_________ there are UFOs.

4. —What were the children doing at this time yesterday?

—They were _________ (给……喂食) animals on the farm.

5. —Lisa, you look much _________(瘦的) than before. Why?

—I become interested in tennis and I often play it with my friends.

单项选择题

Ⅰ型屏蔽服的熔断电流应大于（）A。

A.40；

B.5；

C.30；

D.15。