题干

内燃机把内能转化为 ____能,若汽油机汽缸活塞的面积为40cm2,燃气在汽缸内产生的高温气压为2.5×105Pa,则活塞上获得的推力为 ____N.

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机械,1000

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      阅读下面诗歌,完成(1)~(4)小题。

                                                                                         风 暴

                                                                                          普希金

                                                                             你可看过岩石上的少女

                                                                              穿着白衣裙,立于波涛上,

                                                                              当海水在混乱的幽暗里

                                                                              和岸石游戏,澎湃和轰响,

                                                                              当电闪以它紫红的光线

                                                                              不断地闪出了她的形象,

                                                                              而海风在冲激和飞旋,

                                                                              扬起了她的轻飘的云裳?

                                                                              美丽的是这海,狂暴、阴郁,

                                                                              闪烁的天空没一块蔚蓝;

                                                                              但相信吧:岩石上的少女

                                                                              比波浪、天空、风暴更美丽。