完型填空新增文章(共3篇)
目录：
第三篇(C级)：What Is Coolest Gas in the Universr?
第十二篇(B级)：Smoking Can Increase Depressive Symptoms in Teens
第十五篇(A级)：Young Adults Who Exercise Get Higher IQ Scores
第三篇
What Is the Coolest Gas in the Universe?
What is the coldest air temperature ever recorded on the Earth? Where was this low temperature recorded? The coldest recorded temperature on Earth was-91℃，which (1) in Antarctica in 1983.
We encounter an interesting situation when we discuss temperatures in (2 ).
Temperatures in Earth orbit actually range from about+1200℃to-120℃.The temperature depends upon (3 )you are in direct sunlight or shade.Obviously，-120℃ is colder than our body can safely endure.Thank NASA science for well-designed space (4 )that protect astronauts from these temperature extremes.
The space temperatures just discussed affect only our areal of the solar (5 ).Obviously，it is hotter closer to the Sun and colder as we travel away from the Sun.Astronomers estimate temperatures at Pluto are about-210℃.How cold is the lowest estimated temperature in the entire universe? Again，it depends upon your (6) .We are taught it is supposedly (7 )to have a temperature below absolute zero，which is-273℃，at which atoms do not move.Two scientists，whose names are Cornell and Wieman，have successfully cooled down a gas to a temperature barely (8) absolute zero.They won a Nobel Prize in Physics in 2001 for their work-not a discovery，in this case2.
Why is the two scientists’ work so important to science?
In the 1920s，Satyendra Nath Bose was studying an interesting (9) about special light particles we now call photons.Bose had trouble (10 )other scientists to believe his theory, (11 )he contacted Albert Einstein.Einstein’s calculations helped him theorize that atoms (12) behave as Bose thought-but only at very cold temperatures.
Scientists have also discovered that (13 )atoms can help them make the world’s atomic clocks even more accurate.These clocks are so accurate today they would only lose3 one second (14 )six million years! Such accuracy will help us travel in space because distance is velocity times time4(d=v×t).With5 the long distances involved in space (15 )，we need to know time as accurately as possible to get accurate distance.
词汇：
Antarctica n.南极洲 photon n.光子
orbit n.轨道 theorize v.推理，使理论化
NASA 美国国家航空和航天管理局 velocity n.速度
Astronomer n.天文学家
Pluto n.冥王星
注释：
1.our area：我们的这个区域。指的是太阳系中环地球的宇宙空间。
2.in this case：在这个案例中。诺贝尔物理奖一般是授予创立某种重大理论或有着重大发现的科学家。在这一案例中，两位科学家不是由于有重大科学发现而得奖，而是由于成功地将气体的温度降到接近绝对零度而得奖。
3.These clocks are so accurate today they would only lose one second…：这些钟如此精确，……
才慢1秒钟。they would only lose one second是结果状语，they之前省略了连接词that。
4.velocity times time：速度乘以时间。times是介词，意为“乘以”。
5.With：由于
练习：
1.A opened B occurred C opposed D operated
2.A Earth B space C planet D star
3.A whether B where C what D when
4.A foods B beds C tools D suits
5.A wind B energy C system D rays
6.A education B status C knowledge D location
7.A reasonable B wonderful C impossible D necessary
8.A above B below C within D beyond
9.A invention B theory C paper D experiment
10.A convincing B begging C ordering D forcing
11.A and B though C but D so
12.A will B would C must D can
13.A ultra-small B ultra-fast C ultra-hot D ultra-cold
14.A any B each C every D some
15.A travel B research C walk D station
答案与题解：
1.B本段叙述地球上记录到的最低温度是-91℃，本段最后一句的后半句显然是交代这一最低温度是在南极洲出现的。所以，occurred(发生，出现)是正确的选择。其他三个选项的词义与上下文的意思相去甚远。
2.B 通观本段，内容是叙述宇宙空间的温度。选项B的space是“宇宙空间”的意思，所以是答案。其他三个选项Earth(地球)、planet(行星)、star(恒星)在词义上都不合适。
3.A上下文的意思是：地球轨道上的温度是介乎+120℃至-120℃之间。温度的变化取决于是向阳还是背阳。whether是“是否"的意思，所以是本题的答案。
4.D上文说-120℃是宇航员无法忍受的温度，下文说美国国家航空和航天管理局生产出某种装置以protect astronauts from these temperature extremes(保护宇航员不受极端温度的侵害)。很明显，这一装置就是“space suits”。
5.C现在讨论的内容是有关太阳系的宇宙空间的温度。本段第二句就说到太阳对温度的影响：靠近太阳的温度高一些，远离太阳的温度就低一些。所以，本题要选system。
6.D整个宇宙空间的温度是多少度呢?温度的高低取决于哪个因素呢?从四个选项分析，温度不会取决于你的education(教育)，你的status(地位)或你的knowledge(知识)，因为这不合乎逻辑。只有选location(位置)才符合上下文的意思。
7.C科学常识告诉我们，绝对零度是宇宙中的最低温度。impossible是答案。
8.A本段前面的句子说到最低温度不会低于-273℃，所以，below、within、beyond都有悖于上述论述。只有above(高于)才与上文的意思相符。
9.B 本段第二句说，Bose没有办法使其他的科学家“believe his theory”，所以第一句的studying an interesting之后缺失的词应该是“theory”。
10.A Bose一筹莫展，只好求助于爱因斯坦，后者通过计算证实了Bose的理论。本题选convincing(说服)最恰当。ordering(命令)或forcing(强迫)都不合逻辑。begging(恳求)也太低三下四了。
11.D本段的第二句的前半句与后半句是因果关系，连词要选so。
12.B 本句的主句中的谓语动词用的是过去时helped，根据“主句为过去时态，宾语从句一般也要用过去时态"这一时态一致的原则，本题要选would。
13.D Cornell and Wieman荣获诺贝尔物理奖，是因为他们成功地将气体的温度降到接近绝对零度。本文最后两段以实际例子说明他们的成就推动了科学的发展。因此，ultra-small，ultra-fast和ultra-hot都与Cornell and Wieman的研究无关联，不会是答案。只有ultra-cold才是合乎逻辑的选择
14.C 从句子“These clocks are so accurate today they would only lose one second six million Years !”推断，原子钟如此精确，每隔600万年才慢1秒。“每隔”的英语用词是every。
15.A 从地球飞向其他星球的宇宙航程很长，计时越精确，测算宇宙飞行器的即时距离就越精确。本段讲的是精确计时对宇宙航行的重要性。所以，选travel是正确的。本题不能选walk，因为space walk是“太空行走”，指的是宇航员离开飞船在宇宙空间中活动，与space travel是两个不同的概念。