(1)英语读书节活动内容(每人须读完一篇学校指定的英文故事,读后活动包括故事复述、读后感交流等);
(2)对活动感受;
(3)对明年读书节的期待。
注意:
(1)词数不少于100;
(2)可适当加入细节,使内容充实、行文连贯;
(3)开头和结尾已给出,不计入总词数。
参考词汇:
读书节Reading Day
Dear Chris,
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Yours,
Li Jin
2 . As far as we know batteries are playing an important role in our life.We couldn’t live without batteries.Why so? Batteries provide power for 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 high energy density(密度)”,said Jae Kwon, assistant professor of electrical and computer engineering at MU. “The radioisotope(放射性同位素) 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, presently the size and thickness of a penny, intended to power various micro / nanoelectromechanreal systems (M/NEMS). 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(半导体). 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(晶体结构) 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 battery could be thinner than the thickness of human hair.
1. According to paragraph 1 and 2,we can learn that________.A.Batteries can only power small sensors . |
B.The larger batteries are,the more power they can provide. |
C.Certain methods with high energy density can provide power abundantly . |
D.Jae Kwon is a professor of electrical and computer engineering at MU. |
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. |
A.to show chemical batteries are widely applied. |
B.to introduce nuclear batteries can be safely used. |
C.to describe a nuclear-powered system. |
D.to introduce various energy sources. |
A.get rid of the radioactive waste |
B.test the power of nuclear batteries. |
C.decrease the size of nuclear batteries |
D.decline the damage to lattice structure. |
A.uses a solid semiconductor |
B.will soon replace the present ones. |
C.could be extremely thin. |
D.has passed the final test. |
A.science news report | B.book review |
C.newspaper advertisement | D.science fiction story |
1. 志愿服务的意义(社会,个人);
2. 个人条件(个性,语言,经历);
3. 希望尽快得到答复。
注意:
*词数不少于100;
*可适当加入细节,以使内容充实、行文连贯;
*开头、结尾已给出,不计入总词数。
参考词汇Winter Olympics
Dear sir,
I’m glad to read the advertisement for volunteers in the 2022 Beijing Winter Olympics.
______________________________________________________________________________________________________________________________________________________________________________________________
Yours,
Xie Fei
1. 神舟十二号载人飞船的历史意义(空间站建造阶段的首次载人飞行任务、三名航天员将完成为期三个月的天和核心舱驻留等);
2. 你的感想。
参考词汇: 神舟十二号飞船 Shenzhou XII spacecraft;
空间站建设阶段 space station construction phase;
天和核心舱 Tianhe core module
注意:
1. 写作词数应为80左右;
2. 请按如下格式在答题卡的相应位置作答。
Dear Mike,
______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
A.it | B.one | C.that | D.those |
A.mustn't have done | B.might have gone |
C.can't have gone | D.needn't have gone |
A.Received | B.Being received |
C.To receive | D.Having received |
A.washed | B.wash |
C.washing | D.to wash |
A.to wind | B.wind | C.winding | D.wound |