汽车安全气囊是一种能有效减小乘员身体受到伤害的装置．行驶的汽车在受到猛烈碰撞时，启动气囊的电路接通，导线发热，电能转化为 ____能，从而引爆囊袋中的压缩气体，气囊充气弹出．驾驶员虽然由于 ____会撞到气囊上，但与直接撞到方向盘上相比，受到的作用力较小，受力面积较 ____，人受到的压强较 ____（后两空填“大”或“小”）

科学家探索自然界的秘密，要付出艰辛的努力，十九世纪初丹麦物理学家奥斯特经过长时间坚持不懈的实验，终于发现了电流周围存在磁场，图中能表明这一现象的是（　　）

阅读下面短文，按要求完成各项任务．

    Everywhere in the world there are different ways of behaving．When we meet someone，everything we say and do expresses our cultural background．So if you want to get on with someone from another culture，it helps to understand something about these differences．

    Even how we stand depends on our culture．English people talk to each other at an average （平均的） distance of 130 cm，while Italians chat at an average distance of 80 cm．So Italians can think that English people are unfriendly because they stand too far away!And English people can think that Italians are too close．

    Touching is also cultural．The French touch much more than Americans．A French couple may touch 100times in half an hour while an American couple may only touch twice!And French teenagers touch each other much more than American teens．

读各种交通运输方式的运费与距离的相关统计图，完成下列各题