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April 10th£¬2016
Dear Susan£¬
                                                          
Sincerely yours£¬
Li Hua£®

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д×÷Òªµã£º1£®ÑûÇëSusanµ£ÈÎÆÀί£» 2£®¼ò½éÇàÄê½Ú¼°»î¶¯£º¢ÙÇìףʱ¼ä£ºÃ¿Äê5ÔÂ4ÈÕ£®¢ÚÓÉÀ´£º¼ÍÄî1919ÄêµÄÇàÄêÔ˶¯ ¢Û½ñÄêѧУÇì×£»î¶¯£ºÓ¢ÓïÑݽ²±ÈÈüºÍʦÉúÊé»­ÉãÓ°×÷Æ·Õ¹ 3£®Ó¢ÓïÑݽ²±ÈÈüÖ÷Ì⣨My Youth My Dream£©¡¢Ê±¼ä¡¢µØµãºÍ²Î¼Ó¶ÔÏó£¨ÇàÄê½ÌʦºÍѧÉú£©£®
ÖØÒª¶ÌÓon behalf of¡­£¨´ú±íijÊ£©£¬invite sb to do£¨¿ÎÍâÔĶÁ£©£¬celebrate Youth Day £¨ Ì¹³ÏµØ˵£©£¬in memory of£¨Ê×ÏÈ£©£¬hold an English speech contest£¨¸ºÖص£¡­£©£¬look forward to£¨ÆÚÍû£©£¬the participation of£¨¡­µÄ²Î¼Ó£©£®
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1£®I am writing£¬¢Ùon behalf of the Youth League of our school£¬¢Úto invite you to be a judge of our English Speech Contest£¬¢Ûwhich is part of the celebration of Youth Day£®
¢Ù´Ë´¦ÊÇÓɽé´Ê¶ÌÓï"on behalf of"×÷×´Ó
¢Ú´Ë´¦ÊDz»¶¨Ê½×÷Ä¿µÄ×´Ó
¢Û´Ë´¦ÊÇÓÉwhichÒýµ¼µÄ·ÇÏÞÖÆÐÔ¶¨Óï´Ó¾ä£¬¶ººÅ֮ǰΪÖ÷¾ä£¬whichÔÚ´Ó¾äÖÐÖÐ×÷Ö÷Óָ´úÇ°ÃæÕû¸öÖ÷¾äµÄÄÚÈÝ£®
2£®The contest£¬whose theme is My Youth My Dream£¬will be held at the stadium from 3 pm£®to 5 pm£®
´Ë´¦ÊÇÓÉ"whose"Òýµ¼µÄ·ÇÏÞÖÆÐÔ¶¨Óï´Ó¾ä£¬whoseÔÚ´Ó¾äÖÐ×÷"theme"¶¨Ó

½â´ð April 10th£¬2016                                           
Dear Susan£¬
I am writing£¬on behalf of the Youth League of our school£¬to invite you to be a judge of our English Speech Contest£¬which is part of the celebration of Youth Day£®¡¾¸ß·Ö¾äÐÍ¡¿
In China£¬Youth Day is celebrated on May 4th every year in memory of the Youth Movement in 1919£®This year our school will hold an English speech contest and an exhibition of the paintings£¬calligraphy works and photos by the teachers and students£®The contest£¬whose theme is My Youth My Dream£¬will be held at the stadium from 3 pm£®to 5 pm£®¡¾¸ß·Ö¾äÐÍ¡¿on May 4 with the participation of all the students and young teachers£®
We'd appreciate it if you could come£®¡¾¸ß·Ö¾äÐÍ¡¿Looking forward to your reply£®
Sincerely yours£¬
Li Hua

µãÆÀ Ìá¸Ù×÷ÎÄÔÚд×÷ʱҪעÒâÄÚÈÝÊÇ·ñ°üº¬ÁËËùÓÐÒªµã£®Ð´×÷ʱעÒâ׼ȷÔËÓÃʱ̬£¬ÉÏÏÂÎÄÒâ˼Á¬¹á£¬·ûºÏÂß¼­¹Øϵ£¬¾¡Á¿Ê¹ÓÃ×Ô¼ºÊìϤµÄµ¥´Ê¾äʽ£¬Í¬Ê±Ò²Òª×¢ÒâʹÓø߼¶´Ê»ãºÍ¸ß¼¶¾äÐÍʹÎÄÕÂÏԵøüÓеµ´Î£¬Æ½Ê±Ðè×¢Òâ»ýÀÛ¶ÌÓïºÍÖØÒª¾äÐÍ£®

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7£®Batteries can power anything from small sensors to large systems£®While scientists are finding ways to make them smaller but even more powerful£¬problems can arise when these batteries are much larger and heavier than the devices themselves£®University of Missouri£¨MU£© researchers are developing a nuclear energy source that is smaller£¬lighter and more efficient£®
"To provide enough power£¬we need certain methods with energy density£¨Ãܶȣ©£¬"said Jae kwon£¬assistant professor of electrical and computer engineering at MU£®"The radioisotope£¨·ÅÉäÐÔͬλËØ£© battery can provide power density that is much higher than chemical batteries£®"
  Kwon and his research team have been working on building a small nuclear battery£¬resently the size and thickness of a penny£¬intended to power various micro/nanoelectromechanical systems£¨M/NEWS£©£®Although nuclear batteries can cause concerns£¬Kwon said they are safe£®
"People hear the word¡®nuclear'and think of something very dangerous£¬"he said£®"However£¬nuclear power sources have already been safely powering a variety of devices£¬such as pace-makers£¬space satellites and underwater systems£®"
  His new idea is not only in the battery's size£¬but also in its semiconductor£¨°ëµ¼Ì壩£®Kwon's battery uses a liquid semiconductor rather than a solid semiconductor£®
"The key part of using a radioactive battery is that when you harvest the energy£¬part of the radiation energy can damage the lattice structure£¨¾§¸ñ½á¹¹£© of the solid semiconductor£¬"Kwon said£®"By using a liquid semiconductor£¬we believe we can minimize that problem£®"
  Together with J£®David Robertson£¬chemistry professor and associate director of the MU Research Reactor£¬Kwon is working to build and test the battery£®In the future£¬they hope to increase the battery's power£¬shrink its size and try with various other materials£®Kwon said that the battery could be thinner than the thickness of human hair£®

71£®Which of the following is true of Jae Kwon£¿C
A£®He teaches chemistry at MU£®
B£®He developed a chemical battery£®
C£®He is working on a nuclear energy source£®
D£®He made a breakthrough in computer engineering£®
72£®Jae Kwon gave examples in Paragraph 4B£®
A£®to show chemical batteries are widely applied
B£®to indicate nuclear batteries can be safely used
C£®to describe a nuclear-powered system
D£®to introduce various energy sources£®
73£®Liquid semiconductor is used toD£®
A£®get rid of the radioactive waste
B£®test the power of nuclear batteries
C£®decrease the size of nuclear batteries
D£®reduce the damage to lattice structure
74£®According to Jae Kwon£¬his nuclear batteryC£®
A£®uses a solid semiconductor
B£®will soon replace the present ones
C£®could be extremely thin
D£®has passed the final test
75£®The text is most probably aA
A£®science news report
B£®book review
C£®newspaper ad
D£®science fiction story£®

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2£®1£®Why do airplanes take longer to fly west than east£¿
It can take five hours to go west-east from New York £¨NY£© to London but seven hours to travel east-west from London to NY£®The reason for the difference is an atmospheric phenomenon known as the jet£¨ÅçÉ䣩stream£®The jet stream is a very high altitude wind which always blows from the west to the east across the Atlantic£®The planes moving at a constant air speed thus go faster in the west-east direction when they are moving with the wind than in the opposite direction£®
2£®What would happen if the gravity on Earth was suddenly turned off£¿
Supposing we could magically turn off gravity£®Would buildings and other structures£¨½¨ÖþÎfloat away£¿What happened would depend on how strongly the things were attached to the Earth£®The Earth is moving at quite a speed£¬moving at over a thousand miles per hour£®If you turn something around your head on a string£¨Ï¸Éþ£©£¬it goes around in a circle until you let go of the string£®Then it flies off in a straight line£®¡®Switching off'gravity would be like letting go of the string£®Things not attached to the Earth would fly off in a straight line£®People in buildings would suddenly shootupwards at a great speed until they hit the ceiling£®Most things outside would fly off into space£®

60£®What information can we get from the first passage£¿A
A£®It is the jet stream that affects how fast airplanes fly£®
B£®Planes go slower when they are moving with the wind£®
C£®It takes more time to fly from NY to London than from London to NY£®
D£®The jet stream always blows from the east to the west across the Atlantic£®
61£®The word"shoot"underlined in the 2nd passage probably means"B"£®
A£®send for                                         
B£®move quickly
C£®come out                                        
D£®grow quickly
62£®It can be inferred that without gravityB£®
A£®buildings and other structures would float away
B£®trees and buildings would not so easily fly off
C£®something around your head would not float away
D£®everything outside buildings would fly off into space
63£®Where can we most probably read this text£¿D
A£®In a research paper£®
B£®In a short story£®
C£®In a travel magazine£®
D£®In a student's book£®

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