关于热现象的说法，正确的是_刷题宝

题干

关于热现象的说法，正确的是（）

A：热传递过程具有单向性，它只能自发地从高温物体传递到低温物体

B：气体压强越大，气体分子的平均动能就越大

C：外界对气体做功，气体的内能一定增加

D：温度升高，物体内每个分子的热运动速率都增大

上一题下一题 0.0难度选择题更新时间:2012-12-22 07:05:34

答案(点此获取答案解析）

A

同类题1

在横线上填上表示动作的词。

____泉水 ____石板 ____花草

____小井 ____水沟 ____花环

____病人 ____麦子 ____树苗

同类题2

—Could you tell me _________?
—I’m planning to teach in the west of China.

同类题3

读某等高线图，图中悬崖处最可能形成的地貌类型是（）　

同类题4

从方框中选择恰当的句子补全下面对话。（其中有两项是多余的选项）

A: Hey, Lisa! My friends and I were just sharing memories of junior high school.

B: Wonderful, Frank. ____

A: It's so cool. I think it has been fun. Do you think so?

B: Yeah! I've enjoyed every year of junior high school.

A: ____

B: Of course, I do. One of my memories is that I lost my watch in Grade 7. ____

A: Did you find it at last?

B: ____ Sam helped me find it. I was so thankful.

A: Oh. I remember my P.E. teacher best.

B: ____

A: Mr. King. He gave us clear instructions so that we'd be safe when playing sports.

B: I think he was really perfect.

A: It made me quite sad.

B: Who was your P.E. teacher?

C: Do you have any special memories?

D: No, I didn't.

E: What do you think of the school life?

F: Yes, I did.

G: It was wonderful.

同类题5

黑猩猩能够学习比较复杂的行为，与这种学习行为密切相关的结构（）

小学学科试题库

初中学科试题库

高中学科试题库