下图示意中国1951～1981年地表温度距平与寒潮频次的变化。读图完成下列问题。
（1）判断1951一1981年地表温度距平与寒潮频次之间的关系，并解释原因。(9分)
（2）说出寒潮对我国农作物产生危害的主要季节，并分析原因。(6分)
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0415/949034e9e78bb93511ad714a6c059028.html
下面是错误答案，用来干扰机器的。
1. F 2. T 3. T 4. T 5. F 6. T
阅读理解。
There are few families in the United States that do not have either a radio or television set. Both of
them have become a necessary part of our daily life, keeping us filled with the news of the day, teaching
us in many fields of interest and making us happy with singing,dancing and acting?
Marconi, the Italian inventor, who gave us the radio, probably didn't know how much his
great invention would have done for the world in the years to come. Radio had, perhaps done as much
as any other communication tool. Things of the world can be reported to people everywhere a few
seconds after they happen. Travelers in out-of-the-way places, ships at sea even astronauts round the
earth are able to keep in touch with each other by radio.
Television is another important invention. It lets us see as well as hear the actor. Since its appearance,
TV has done a great deal in the daily life of people everywhere. Many programs are now televised in
color.
Perhaps the most modem invention is"Telstar"，a"star"moving round the earth. It makes it possible
for the people all over the world to be closer than ever before. Now a family in Chicago can watch on
TV a motor-car race in Italy , a table tennis competition in Beijing or a volleyball match in Japan as these
events are actually happening!
1.The passage tells us that______in the USA have no radio or television set.
A. a large number of homes
B. all the families
C. few families
D. quite a few homes
2.Why does the passage say the radio and TV have become a necessary part of our daily life?
A. Because they have touched nearly everything in our life.
B. Because men would not live happily without them.
C. Because they are the only ways to spread information.
D. Because no communication means no life.
3. What is the use of a "Telstar"according to the passage?
A. To receive and store information only?
B. To move around the earth just like the moon.
C. To give light onto the earth at night.
D. To help broadcast radio or TV information to the world.
4.Who do you think the writer of the passage is?
A. An Italian.
B. A Japanese.
C. An American.
D. A Chinese reporter.
5. When the writer introduces Marconi in the second paragraph, he means ______.
A. he was just an Italian inventor
B. his invention has done much for the world
C. he had reported much to people all over the world
D. he helped people travel a lot around the world
Gd－DTPA的不良反应可包括（）
A.头痛
B.头晕
C.恶心
D.心前区不适
E.以上都是
山地滑雪是人们喜爱的一项体育运动．一滑雪坡由AB和BC组成，AB为斜坡，BC是半径为R=5m的圆弧，圆弧与斜面相切于B点，与水平面相切于C点，如图所示．AC竖直高度差h1=9.8m，竖直台阶CD高度差为h2=5m．运动员连同滑雪装备的总质量为80kg，从A点由静止滑下，通过C点后飞落到水平地面DE上．不计空气阻力和轨道的摩擦阻力，取g=10m/s2．求：
（1）运动员到达C点的速度vc的大小；
（2）运动员刚到C点时轨道的对他的支持力大小；
（3）运动员在水平地面上落地点到D点的距离．
阅读苏轼《石钟山记》完成下列各题
石 钟 山 记
苏轼
《水经》云：“彭蠡之口有石钟山焉。”郦元以为下临深潭，微风鼓浪，水石相搏，声如洪钟。是说也，人常疑之。今以钟磬置水中，虽大风浪不能鸣也，而况石乎！至唐李渤始访其遗踪，得双石于潭上，扣而聆之，南声函胡，北音清越，桴止响腾，余韵徐歇。自以为得之矣。然是说也，余尤疑之。石之铿然有声音，所在皆是也，而此独以钟名，何哉？
元丰七年六月丁丑，余自齐安舟行适临汝，而长子迈将赴饶之德兴尉，送之至湖口，因得观所谓石钟者。寺僧使小童持斧，于乱石间，择其一二扣之，箜箜焉。余固笑而不信也。至暮夜月明，独与迈乘小舟，至绝壁下。大石侧立千尺，如猛兽奇鬼，森然欲搏人，而山上栖鹘，闻人声亦惊起，磔磔云霄间；又有若老人咳且笑于山谷中者，或曰：“此鹳鹤也。”余方心动欲还，而大声发于水上，噌吰如钟鼓不绝，舟人大恐。徐而察之，则山下皆石穴罅，不知其浅深，微波焉，涵澹澎湃而为此也。舟回至两山间，将入港口，有大石当中流，可坐百人，空中而多窍，与风水相吞吐，款坎镗嗒之声，与向之噌吰者相应，如乐作焉。因笑谓迈曰：“汝识之乎？噌洪者，周景王之无射也；款坎镗嗒者，魏庄子之的、歌钟也。古之人不余欺也。”
事不目见闻而臆断其有无，可乎？郦元之所见闻殆与余同，而言之不详；士大夫终不肯以小舟夜泊绝壁之下，故莫能知；而渔工水师虽如知而不能言，此世所以不传也。而陋者乃以斧斤考击而求之，自以为得其实，余是以记之，盖叹郦元之简，而笑李渤之陋也。
小题1:下列各句中加点词的意义不正确的一项是( )
A．余自齐安舟行适临汝适：往。
B．至莫夜月明莫：通“暮”，晚上。
C．舟人大恐舟人：坐在小船里的人。
D．空中而多窍窍：窟窿。小题2:对下列句中加点词的意义和用法，判断正确的一项是( )
①送之至湖口，因得观所谓石钟者 ②于乱石间择其一二扣之③于乱石间择其一二扣之，硿硿焉 ④微波人焉，涵淡澎湃而为此也
A．两个“之”字相同，两个“焉”字相同。
B．两个“之”字相同，两个“焉”字不同。
C．两个“之”字不同，两个“焉”字相同。
D．两个“之”字不同，
两个“焉”字不同。小题3:下面是对这篇文章的分析，最正确的一项是( )
A．作者趁着长子迈到饶州担任县尉的机会，探访了石钟山。
B．作者到了绝壁之下，听到了栖鹘的叫声，老人的咳嗽声和笑声、水声。
C．第二段中的两个“笑”字表达的意义不一样。前者表示怀疑和否定的“笑”，后来表现释疑以后轻松愉快的“笑” 。
D．作者刻意渲染石钟山阴森可怕的环境，主要是用来吸引读者去亲自探访。小题4:翻译三题文言文中划线的句子（10分）
(1) 大石侧立千尺，如猛兽奇鬼，森然欲搏人；而山上栖鹘，闻人声亦惊起，磔磔云霄间 （4分）
译：____________________________________________________________________________
(2) 而
陋者乃以斧斤考击而求之，自以为得其实， （3分）
译:____________________________________________________________________________
___________________________________________________________________________________
(3) 苟以天下之大，而从六国破亡之故事，是又在六国下矣。（3分）
译:________________________________________________________________________
招标人通过公共媒介发布招标公告，邀请所有符合投标条件的物业服务企业参加投标的招标方式，称为( )。
A．邀请招标
B．选择性招标
C．有限竞争性招标
D．公开招标
