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阅读理解。 A seventeen-year-old boy from the northeastern state of Massachusetts has won the top prize in the Intel Science Talent Search. The competition is the oldest program in the United States that honors the science projects of high school students. The Intel Science Talent Search is 63 years old this year. The winners receive a new computer and money for a college education. This year 1 652 students from 46 states entered projects for the competition. Their research involved nearly every area of science, including chemistry, medicine, physics, mathematics, engineering, computer science and social science. Forty students were invited to Washington, D. C. for the final judging. A group of well-known scientists judged them on their research abilities, critical thinking skills and creativity. The judges also questioned the students about scientific problems before deciding on the winners. The top winner is Herbert Mason Hedberg of North Attleboro, Massachusetts. The second place winner is Boris Alexeev of Athens, Georgia and the third place winner is Ryna Karnik of Aloha, Oregon. Herbert received 100 000 dollars for his college education. He developed a faster, more effective method to tell if a person has cancer. He explored a way to separate telomerase, an enzyme (酶) found in most cancer cells. His findings have helped advance research into ways of stopping cancer cells from growing. Herbert said he started the project after watching his grandmother struggle against cancer. He plans to be a doctor and continue doing, medical research. Andrew Yeager of the University of Pittsburgh Medical Center was chairman of the judges for the Intel Science Talent Search this year. He said the competition was an excellent way to discover future leaders in science and technology. Past competition winners have gone on to receive many of the world's highest honors for science and mathematics. 1. Herbert's way is more effective because _____. A. it can kill cancer cells faster B. it helps to free humans from cancer C. it can stop cancer cells from growing D. it can tell faster if a person is a cancer sufferer 2. We can learn from the passage that _____. A. the final judging of the competition took place in the state of Massachusetts B. less than three percent of the competitors entered the final part of the competition C. critical thinking and creativity are more important than research abilities D. the scientists judging this year's competition all work for Intel Corporation 3. What would be the best title for the passage? A. Intel Science Talent Search B. How to Discover Future Scientists C. Intel Science Talent Search Winners D. A Very Famous Competition
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【单选题】关于胶片特性曲线,叙述正确的是
A.
产生反转是由于曝光不足所致
B.
呈线性
C.
胶片感光速度越快,初感点越高
D.
直线部密度与曝光量呈反比
E.
可表示感光材料的特性
【判断题】微观粒子的位置和动量之所以不可能同时精确测定,归根结底是微观粒子具有波粒二象性的一种客观反映。
A.
正确
B.
错误
【判断题】不确定关系表明微观粒子的位置和动量(含速度)不可能同时具有确定的取值,因此,不能用经典的位置和速度去描述微观粒子的运动状态。
A.
正确
B.
错误
【单选题】关于胶片特性曲线的叙述正确的是
A.
产生反转是由于曝光不足所致
B.
为线性曲线
C.
胶片感光速度越快初感点越高
D.
直线部密度与曝光量成反比
E.
可表示感光材料的特性
【单选题】You mustn't let your social life get ______ of your studies.
A.
on the way
B.
in no way
C.
in the way
D.
by the way
【单选题】'Let not the sun go down upon your wrath' probably means ______.
A.
Don't let your anger last long
B.
Don't get angry while the sun is going down
C.
Don't get angry easily about little things
D.
Don't watch the sun set while you are angry
【判断题】一个微观粒子的某些物理量(如位置和动量,或方位角与动量矩,还有时间和能量等),不可能同时具有确定的数值,其中一个量越确定,另一个量的不确定程度就越大。
A.
正确
B.
错误
【单选题】Let children speak their own opinions, ______they are different from your own.
A.
until
B.
unless
C.
as though
D.
even if
【简答题】A boy who was cleaning shoes in the street said to a young man 1 by, “Let me clean your shoes, 2 ?”The young man said, “No, thank you .”“You may 3 me only a pound for that, sir.” said the boy. 4 the y...
【简答题】Let your ( )食欲 be the guide.
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