下列四个现象中，属于内能转化为机械能的是_刷题宝

题干

下列四个现象中，属于内能转化为机械能的是（）

A：脚踩滑板从高处滑下

B：用弹弓弹射子弹

C：滴有酒精的盒子，点火后盒盖飞出

D：将铁丝快速地弯折多次，弯曲处发热

上一题下一题 0.0难度选择题更新时间:2019-06-25 03:14:15

答案(点此获取答案解析）

C

同类题1

阅读下面从材料，从A、B、C、D四个选项中选出最佳选项。

International Store Clothes Branches(国际商店服装专柜)

Name: T-shirt
Brand(商标）: Hello Kitty
Colors: yellow, pink, green, blue, black
Size: S/M/XL
Price: £ 15(£1=¥9.2)

Name: shirt
Brand: Youngor
Colors: white, black, yellow, pink, purple, blue
Sizes: S/M/L/XL
Prices: £20

Name: jacket
Brand: Goldlion
Colors: white, black, blue, yellow, purple
Sizes: S/M/L/XL
Prices: $300($1=¥6.1)

Name: skirt
Brand: Gloria
Colors: yellow, blue, red, pink, black, brown
Sizes: S/M/L
Prices: ¥90

Name: jeans
Brand: Playboy
Colors: red, black, pink, brown, blue
Sizes: S/M/L/XL
Prices: ¥160

Name: shorts
Brand: Polo
Colors: white, black, blue
Sizes: S/M/L/XL
Price: $4

同类题2

如图，在六边形ABCDEF中，∠A=∠B=∠C=∠D=∠E=∠F，且AB+BC=22，试求DE+EF的值．

同类题3

阅读短文，判断正误。

Marysees John in the garden (花园). So she asks, "What are you doing?" I'm watering the flowers. Mymother says we must water the flowers everyday. Or ( 否则 ) they will die( 死).”Says John. “But it's rainingnow.” “Oh, it doesn't matter now.” "Mary, I have an umbrella. ( 伞).”

同类题4

科技创新是推动社会进步与发展的重要动力．阅读下列材料，回答问题：

材料一

材料二

材料三

同类题5

beside ____
There are five pencils in his pencil box.

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