题目内容

Dr．Peter Spence, __________ headmaster of the school, told us, “__________ fifth of pupils here go on to study at Oxford and Cambridge．”

[　　]
A．

a; A

B．

不填；The

C．

the; The

D．

不填；A

答案：D
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　　One genetic mutation(基因突变)occurs on average for every 15 cigarettes that a typical lung-cancer patient smokes, according to a study that has found for the first time all of the mutations happen during the lifetime of a cancer patient．

　　Scientists have completed a full genetic examinations of the genomes(基因组)of cancer patients, and hope the information will lead to a basic understanding of the causes of cancer－and possibly drugs and treatments－by making out the mutations that turn a healthy cell into a cancerous tumor cell．

　　They studied a lung-cancer patient who had about 23,000 DNA mutations in his lung cells that were connected with exposure(暴露)to the toxins found in cigarette smoke and had built up over his lifetime．

　　They also looked at a patient with malignant melanoma(恶性黑色肿瘤), the most dangerous form of skin cancer, who had got 30,000 special mutations known to be connected with exposure to sunlight．

　　Scientists believe this new finding into the genetics of cancer will finally lead to new drugs and perfect treatments that aim at the specific changes to the gene that cause the disease, as well as new techniques for discovering following cancers that have escaped from treatment in other parts of the body．

　　“For the first time, we have a complete map of all mutations in a cancer cell,” said Dr．Peter Campbell, who led the Cancer Genome project to work out the whole DNA system of tumor cells in order find the mutations．

　　A similar method was performed on the cells of a patient with skin cancer, which is how the researchers were able to show that the malignant skin cells contained changes that resulted from exposure to light．

　　“These are the two main cancers in the developed world for which we know the chief exposure．For lung cancer it is cigarette smoke, and for malignant melanoma it is exposure to sunlight,” Professor Campbell said．

(1)

What can the genetic examination of the genomes of cancer patients be used for?

[　　]

A．

To help the professors to win the Nobel Prizes．

B．

To advance the study of reason and cure of cancer．

C．

To make the medicine industries earn more money．

D．

To help the cancer patients reduce their pain．

(2)

The underlined word in the third paragraph can be placed by _________．

[　　]

A．

smoke

B．

sunlight

C．

cell

D．

poison

(3)

Which of the following statements is right according to the passage?

[　　]

A．

The lung-cancer patient had 30,000 mutations in his lung cells．

B．

The genetics of cancer will finally lead to new drugs soon．

C．

It’s the first time that people mapped mutations in a cancer cell．

D．

Dr．Peter tries to invent a new drug with the DNA system．

(4)

What’s the similarity between malignant melanoma and skin cancer of patients?

[　　]

A．

Their smoking too much in daily life．

B．

Their receiving too much sunshine．

C．

Their refusing to accept treatment．

D．

Their interest in travelling abroad．

ALBANY，New York—Students who rely on working at night to improve their

grades might want to sleep on that strategy: A new survey in the US says those who never study all night have slightly higher grades than those who do.

A survey of 120 students at St.Lawrence University found that students who had never pulled an all??nighter on average had higher grades than those who had. The survey found those who did not study through the night had a grade point average of 3.2 compared to 2.95 for those who did.

The study, by assistant professor of psychology Pamela Thacher, is to be included in the January issue of Behavioral Sleep Medicine.

“It's not a big difference，but it's pretty striking, ” Thacher said, “I am primarily a sleep researcher and I know nobody thinks clearly at 4∶00 in the morning. You think you can do，but you can't.”

Many college students, of course, have inadequate or irregular sleep, for reasons ranging from excessive caffeine to poor time management.

“A lot of students were under the impression that all??nighters were a very useful tool for accomplishing work, and that caffeine intake was very useful in meeting deadlines and stuff like that, ”said Mr Chatani, who had a 3.4 grade point average last term.

Dr Howard Weiss, a physician at St.Peter's Sleep Center in Albany, said the study results made sense.

“Certainly that data is out there showing that short sleep duration absolutely interferes with concentration and performance on objective testing, ”he said.

“Some night owls do get good grades, of course，which may be explained by circadian (昼夜节律的，生理节奏的) rhythms, ”Weiss said, “Some people have different 24??hour body clocks from others, and may do better depending on classes and testing time.”

The purpose of the passage is to tell us 　　　　

  A. the bad effects of pulling an all??nighter

  B. pulling an all??nighter leads to sleep problems

  C. Thacher's doubt about all??nighters

  D. all??nighters influence students' grades

According to Thacher's study，around 4 o'clock in the morning is a time when 　　　　.

  A. one can think more clearly

  B. one has his/her best memory

  C. one can't learn efficiently

  D. one's brain falls into a period of deep sleep

What can we know from Dr Howard Weiss' words？

  A. Thacher's study is not convincing enough.

  B. He believes in Thacher's study.

  C. Thacher's study makes no sense.

  D. Thacher should take exceptions into consideration.


ALBANY，New York—Students who rely on working at night to improve their
grades might want to sleep on that strategy: A new survey in the US says those who never study all night have slightly higher grades than those who do.
A survey of 120 students at St.Lawrence University found that students who had never pulled an all­nighter on average had higher grades than those who had. The survey found those who did not study through the night had a grade point average of 3.2 compared to 2.95 for those who did.
The study, by assistant professor of psychology Pamela Thacher, is to be included in the January issue of Behavioral Sleep Medicine.
“It's not a big difference，but it's pretty striking, ” Thacher said, “I am primarily a sleep researcher and I know nobody thinks clearly at 4∶00 in the morning. You think you can do，but you can't.”
Many college students, of course, have inadequate or irregular sleep, for reasons ranging from excessive caffeine to poor time management.
“A lot of students were under the impression that all­nighters were a very useful tool for accomplishing work, and that caffeine intake was very useful in meeting deadlines and stuff like that, ”said Mr Chatani, who had a 3.4 grade point average last term.
Dr Howard Weiss, a physician at St.Peter's Sleep Center in Albany, said the study results made sense.
“Certainly that data is out there showing that short sleep duration absolutely interferes with concentration and performance on objective testing, ”he said.
“Some night owls do get good grades, of course，which may be explained by circadian (昼夜节律的，生理节奏的) rhythms, ”Weiss said, “Some people have different 24­hour body clocks from others, and may do better depending on classes and testing time.”
63.The purpose of the passage is to tell us 　　　　
A. the bad effects of pulling an all­nighter
B. pulling an all­nighter leads to sleep problems
C. Thacher's doubt about all­nighters
D. all­nighters influence students' grades
64. According to Thacher's study，around 4 o'clock in the morning is a time when 　　　　.
A. one can think more clearly
B. one has his/her best memory
C. one can't learn efficiently
D. one's brain falls into a period of deep sleep
65.What can we know from Dr Howard Weiss' words？
A. Thacher's study is not convincing enough.
B. He believes in Thacher's study.
C. Thacher's study makes no sense.
D. Thacher should take exceptions into consideration.

ALBANY，New York—Students who rely on working at night to improve their

grades might want to sleep on that strategy: A new survey in the US says those who never study all night have slightly higher grades than those who do.

A survey of 120 students at St.Lawrence University found that students who had never pulled an all­nighter on average had higher grades than those who had. The survey found those who did not study through the night had a grade point average of 3.2 compared to 2.95 for those who did.

The study, by assistant professor of psychology Pamela Thacher, is to be included in the January issue of Behavioral Sleep Medicine.

“It's not a big difference，but it's pretty striking, ” Thacher said, “I am primarily a sleep researcher and I know nobody thinks clearly at 4∶00 in the morning. You think you can do，but you can't.”

Many college students, of course, have inadequate or irregular sleep, for reasons ranging from excessive caffeine to poor time management.

“A lot of students were under the impression that all­nighters were a very useful tool for accomplishing work, and that caffeine intake was very useful in meeting deadlines and stuff like that, ”said Mr Chatani, who had a 3.4 grade point average last term.

Dr Howard Weiss, a physician at St.Peter's Sleep Center in Albany, said the study results made sense.

“Certainly that data is out there showing that short sleep duration absolutely interferes with concentration and performance on objective testing, ”he said.

“Some night owls do get good grades, of course，which may be explained by circadian (昼夜节律的，生理节奏的) rhythms, ”Weiss said, “Some people have different 24­hour body clocks from others, and may do better depending on classes and testing time.”

63.The purpose of the passage is to tell us 　　　　

A. the bad effects of pulling an all­nighter

B. pulling an all­nighter leads to sleep problems

C. Thacher's doubt about all­nighters

D. all­nighters influence students' grades

64. According to Thacher's study，around 4 o'clock in the morning is a time when 　　　　.

A. one can think more clearly

B. one has his/her best memory

C. one can't learn efficiently

D. one's brain falls into a period of deep sleep

65.What can we know from Dr Howard Weiss' words？

A. Thacher's study is not convincing enough.

B. He believes in Thacher's study.

C. Thacher's study makes no sense.

D. Thacher should take exceptions into consideration.

 

ALBANY，New York—Students who rely on working at night to improve their

grades might want to sleep on that strategy: A new survey in the US says those who never study all night have slightly higher grades than those who do.

A survey of 120 students at St.Lawrence University found that students who had never pulled an all??nighter on average had higher grades than those who had. The survey found those who did not study through the night had a grade point average of 3.2 compared to 2.95 for those who did.

The study, by assistant professor of psychology Pamela Thacher, is to be included in the January issue of Behavioral Sleep Medicine.

“It's not a big difference，but it's pretty striking, ” Thacher said, “I am primarily a sleep researcher and I know nobody thinks clearly at 4∶00 in the morning. You think you can do，but you can't.”

Many college students, of course, have inadequate or irregular sleep, for reasons ranging from excessive caffeine to poor time management.

“A lot of students were under the impression that all??nighters were a very useful tool for accomplishing work, and that caffeine intake was very useful in meeting deadlines and stuff like that, ”said Mr Chatani, who had a 3.4 grade point average last term.

Dr Howard Weiss, a physician at St.Peter's Sleep Center in Albany, said the study results made sense.

“Certainly that data is out there showing that short sleep duration absolutely interferes with concentration and performance on objective testing, ”he said.

“Some night owls do get good grades, of course，which may be explained by circadian (昼夜节律的，生理节奏的) rhythms, ”Weiss said, “Some people have different 24??hour body clocks from others, and may do better depending on classes and testing time.”

63.The purpose of the passage is to tell us 　　　　

  A. the bad effects of pulling an all??nighter

  B. pulling an all??nighter leads to sleep problems

  C. Thacher's doubt about all??nighters

  D. all??nighters influence students' grades

64. According to Thacher's study，around 4 o'clock in the morning is a time when 　　　　.

  A. one can think more clearly

  B. one has his/her best memory

  C. one can't learn efficiently

  D. one's brain falls into a period of deep sleep

65.What can we know from Dr Howard Weiss' words？

  A. Thacher's study is not convincing enough.

  B. He believes in Thacher's study.

  C. Thacher's study makes no sense.

  D. Thacher should take exceptions into consideration.

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