下面哪个过程是通过热传递的方法改变物体内能的 [ ] A、冬天

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问题选择题

下面哪个过程是通过热传递的方法改变物体内能的 [ ]

A、冬天，两手互相搓搓，能使手暖和

B、用锯锯木头，锯条发热

C、地面被太阳晒热

D、水蒸气把壶盖顶起来，它的温度降低

答案

答案：C

听力题

词汇运用

小题1:I think Mo Yan is writer that I have ever known.(success)

小题2:Luckily, many patients in the earthquake in Ya’an didn’t hurt badly. (they)

小题3:All the students for the coming exam at this time last year.(prepare)

小题4:The famous artist, Li Wenhua, passed away peacefully in his (eighty).

小题5:After 2 months’ hard work, the bridge was built (complete).

小题6:The boy’s parents both died in the accident. We’re sorry about his (happy).

小题7:We’re sure that the knife belongs to one of the (thief).

小题8:How excited they were (chat) with each other at the party!

小题9:—Can I borrow your pen? —Sorry. It to Jim.(lend)

小题10:What difficulty will you have (control) the machine?

单项选择题

是医学伦理学目的和检合标准者属( )

A．实践性特征
B．继承性特征
C．时代性特征
D．客观性特征
E．道德性特征