海地大地震是世界上最大的地震吗?

解题思路：（1）声音是由物体的振动产生的，固体、液体和气体都可以传播声音；
（2）压强与压力和受力面积有关，增大受力面积可以减小压强；用枕头保护头部，物体撞击时，先撞击枕头，再通过枕头传到头部，起到了一个缓冲的作用；
（3）固体承受力的能力强；
（4）地震中，建筑物有再次倒塌的可能，因此要快速离开．

A、人被埋在废墟中，如果大声呼喊不仅地面上的人听不清，同时还会浪费自己的体力．为了能让地面上的人听到声音，可以采用敲击就近的敲击水泥板、金属管让其发声，同时产生的声音会通过水泥板、金属管传播（铁制管道不仅能传声而且传声性能比空气还好），这样就能很好让地面上救援的人听到声音，故本选项正确，但不符合题意．
B、用枕头保护头部可大大减小物体对头部的撞击力；故本选项正确，但不符合题意．
C、坚固的桌子面积较大，可以承受较大的压强；故本选项正确，但不符合题意．
D、快速离开建筑物的目的是防止建筑物倒塌“重力势能转化为动能”导致人体受到伤害，与比热容知识无关，故本选项说法不正确，符合题意．
故选D．

点评：
本题考点： 声音的传播条件；减小压强的方法及其应用．

考点点评： 我们本题以地震为题材，考查了固体能够传声，体现了物理和实际生活的联系；不仅要会用学过的知识解答问题，解释生活中的现象，还要将所学的知识应用到生活生产中，以解决实际的问题．

12 Jan 2010,a massive earthquake hit Haiti without warning and caused devastation across the country.Countless buildings were destroyed and thousands of people were killed in the unpredictable quake.Several areas were on fire and had no electricity supply.The survivors of the quake had been left without facilities,food and water.Now,as you are reading this,the Haitians are still crying for helps and as a human being,it is our duty to help those who suffer over the incident with our greatest strength.
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12 Jan 2010,a massive earthquake hit Haiti without warning and caused devastation across the country.Countless buildings were destroyed and thousands of people were killed in the unpredictable quake.Several areas were on fire and had no electricity supply.The survivors of the quake had been left without facilities,food and water.Now,as you are reading this,the Haitians are still crying for helps and as a human being,it is our duty to help those who suffer over the incident with our greatest strength.
有用请采纳,有问题请留言
拜托你采纳吧...求求你了...

和这个有些像,你参考一下吧
假设你是李华,在得知四川大地震的消息之后,作为校学生会主席,你决定给灾区的中学生写一封慰问信,主要内容包括：1、得知四川发生突如其来的特大地震灾害,心情非常难过；2、看到你们表现得非常镇定、坚强,感动得热泪盈眶；3、患难见真情,全校师生向你们表示慰问的同时,共计捐款12万元；4、美好家园可以重建,希望你们要看到希望、充满信心.参考词汇：捐款 make a donation to
One possible version:
Dear friends,
I’m awfully sorry to hear that a horrible and severe earthquake unexpectedly hit your hometown.Faced with such a rarely-seen disaster,you remain so calm and strong-willed that we are all moved to tears.A friend in need is a friend indeed.Thinking about your present situation,we can not wait a minute to make every bit of our effort to help you.I,as the chairman of student union,on behalf of all my schoolmates,express our most sincere pity and care for you.Besides,we make a donation of 120 thousand yuan to you,expecting that it can help you go through the difficulty.A better hometown can be rebuilt.Therefore,never give up whatever happens.Remember we won’t be far away when you need any help!
Yours Sincerely,