作为汽车发动机的汽油机,一个工作循环是由四个冲程组成的.其中压缩冲程是通过____ 的方式使汽缸内的气体内能增加的.小明同学阅读了某牌号汽车发动机的说明书后,将内燃机的能量流向制成如图所示的图表,根据给出的信息可知,该内燃机的效率最大为____
A:____that?
B: It's a radio.
A:____often listen to the radio?
B:____, I do.
A:____do you often listen to?
B: I often listen to music.
A:____do you often listen to the music?
B: In the park or at home.
读下列省(区)轮廓图,“陇”和“蜀”分别是哪两个省(区)的简称( )