题干

为了方便残疾人,地铁2号线列车在每节车厢进门处,都设置了残疾人专用扶手,还专门配置了安全带.关于扶手和安全带的说法正确的是

A:列车减速时,扶手对人体作用力的方向与人体受到的惯性力方向相反

B:扶手和安全带可以减小乘客的惯性,避免碰撞

C:列车减速时,乘客紧抓扶手是通过增大压力来增大摩擦

D:安全带比较宽大是为了减小对人体的压力

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答案(点此获取答案解析)

C

同类题2

根据短文理解,选择正确答案。

    I wandered into the small store where I usually buy milk, when the store owner received a call from a customer. The customer and his wife had shopped there several months earlier. He noticed that his wife really liked one thing in the store, so he wanted to buy it as a surprise.

    But the customer was in Tennessee, far away from the store which was in Maine. What was more, he had been to the store several months earlier, and it was difficult to believe that the store owner would remember him, or what he was looking for.

    The store owner took a few close-up photos with her camera, and e-mailed them to the customer on the computer. The customer looked at the photos, and decided which one he wanted. They talked and discussed a price over the phone. She took care of the credit card transaction (交易) online, and promised the gift would be shipped out that afternoon.

    The store owner was really smart. She was willing to push herself to find new ways to make the transaction actually happen. And it did work. However, it was the first time she had ever done it.

    I was amazed that the store owner discovered a creative solution that could lead to a new way of doing business. I was impressed by what she did—so easily, but how difficult it is for many of us to make that leap(飞跃). I'm not just talking about technology, but about learning how to adapt to change. Most people hate or fear change unless they get to know exactly what change needs to be made. However, we should realize that challenge and opportunity go hand in hand.

同类题3

阅读材料,完成下列要求。

材料一 2015年9月22日,***主席开始了对美国为期四天的国事访问。纵观***主席任职以来的出访和演讲,有一个非常核心的东西——就是一直在传递中国的和平发展理念。走和平发展道路,是对中华民族优秀文化传统的传承和发展。中国人民历来崇尚“和而不同”“以和为贵”的理念,这成为处理国与国关系的重要价值观。中华民族以“海纳百川,有容乃大”的胸怀,接受一切有益的外来文化,留下了不少对外文化交流的千古佳话。中国人民崇尚“己所不欲,勿施于人”,不将自己的意志强加于人,对外待之以礼,实行睦近交远。我国的“贵和”思想,促进了人类和平事业的发展。

材料二 2015年11月30日,******出席气候变化巴黎大会开幕式,并发表题为《携手构建合作共赢、公平合理的气候变化治理机制》的讲话。他指出,巴黎大会要加强《联合国气候变化框架公约》的实施,达成一个全面、均衡、有力度、有约束力的气候变化协议。中国政府将认真落实气候变化领域南南合作政策承诺,继续推进清洁能源、防灾减灾、生态保护、低碳智慧型城市建设等国际合作。巴黎协议应为推动全球更好实现可持续发展注入动力,实现互惠共赢。要确保国际规则的有效遵守和实施,坚持民主、平等、正义,遵守共同但有区别的责任原则。强调各方要展现诚意、坚定信心、齐心协力,推动建立公平有效的全球应对气候变化机制,实现更高水平全球可持续发展,构建合作共赢的国际关系。