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Without regular supplies of some hormones our capacity to behave would be seriously impaired; without others we would soon die. Tiny amounts of some hormones can modify moods and actions, our inclination to eat or drink, our aggressiveness or submissiveness, and our reproductive and parental behavior. And hormones do more than influence adult behavior; early in life they help to determine the development of bodily form and may even determine an individual’s behavioral capacities. Later in life the changing outputs of some endocrine glands and the body’s changing sensitivity to some hormones are essential aspects of the phenomena of aging.
Communication within the body and the consequent integration of behavior were considered the exclusive province of the nervous system up to the beginning of the present century. The emergence of endocrinology as a separate discipline can probably be traced to the experiments of Bayliss and Starling on the hormone secretion. This substance is secreted from cells in the intestinal walls when food enters the stomach; it travels through the bloodstream and stimulates the pancreas to liberate pancreatic juice, which aids in digestion. By showing that special cells secret chemical agents that are conveyed by the bloodstream and regulate distant target organs or tissues. Bayliss and starling demonstrated that chemical integration could occur without participation of the nervous system.
The term “hormone” was first used with reference to secretion. Starling derived the term from the Greek hormone, meaning “to excite or set in motion. The term “endocrine” was introduced shortly thereafter “Endocrine” is used to refer to glands that secret products into the bloodstream. The term “endocrine” contrasts with “exocrine”, which is applied to glands that secret their products though ducts to the site of action. Examples of exocrine glands are the tear glands, the sweat glands, and the pancreas, which secrets pancreatic juice through a duct into the intestine. Exocrine glands are also called duct glands, while endocrine glands are called ductless.
1.What is the author’s main purpose in the passage?
A.To explain the specific functions of various hormones.
B.To provide general information about hormones.
C.To explain how the term “hormone” evolved.
D.To report on experiments in endocrinology.
2.The passage supports which of the following conclusions?
A.The human body requires large amounts of most hormones.
B.Synthetic hormones can replace a person’s natural supply of hormones if
necessary.
C.The quantity of hormones produced and their effects on the body are related
to a person’s age.
D.The short child of tall parents very likely had a hormone deficiency early
in life.
3.It can be inferred from the passage that before the Bayliss and Starling
experiments, most people believed that chemical integration occurred
only___.
A.during sleep.
B.in the endocrine glands.
C.under control of the nervous system.
D.during strenuous exercise.
4.The word “liberate” could best be replaced by which of the following?
A.Emancipate B.Discharge C.Surrender D.Save
5.According to the passage another term for exocrine glands is___.
A.duct glands
B.endocrine glands
C.ductless glands
D.intestinal glands.
Passage 3
Questions 11 to 15 are based on the following passage:
The idea of a special day to honor mothers was first put forward in America
in 1907. two years later a woman, Mrs. John Bruce Dodd, in the state of
Washington proposed a similar day to honor the head of the family—the father.
Her mother died when she was very young, and her father brought her up. She
loved her father very much.
In response to Mrs. Dodd’s idea that same year—1909, the state governor of
Washington proclaimed (宣布) the third Sunday in June Father’s Day. The idea was
officially approved by President Woodrow Wilson in 1916. in 1924, President
Calvin Coolidge recommended national observance of the occasion “to establish
more intimate (亲密) relations between fathers and their children, and to impress
upon fathers the full measure of their obligations.” The red or white rose is
recognized as the official Father’s Day flower.
Father’s Day took longer to establish on a national scale than Mother’s Day,
but as the idea grained popularity, tradesmen and manufacturers began to see the
commercial possibilities. They encouraged sons and daughters to honor their
fathers with small thank-you presents, such as a tie or pair of socks, as well
as by sending greeting cards.
During the Second World War, American servicemen stationed in Britain began
to request Father’s Day greeting cards to send home. This generated a response
with British card publishers. Though at first the British public was slow to
accept this rather artificial day, it’s now well celebrated in Britain on the
third Sunday in June in much the same way as in America.
Father’s Day seems to be much less important as occasion than the Mother’s
Day. Not many of the children offer their fathers some presents. But the
American fathers still think they are much better fated than the fathers of many
other countries, who have not even a day for their sake in name only.
11. When did Father’s Day officially begin to have national popularity?
A. 1907 B. 1909 C. 1916 D. 1924
12. Who first started the idea of holding the Father’s Day?
A. Mrs. John Bruce Dodd B. Mrs. John Bruce’s Mother
C. The government of Washington. D. Some businessmen.
13. What flower will be popular on Father’s Day?
A. Lily B. Water Lily C. Red rose or white rose D. Sunflower.
14. Which statement is true, a according to this passage?
A. It took even longer for Mother’s Day to gain national popularity.
B. The businessmen helped to make Father’s Day popular.
C. Father’s Day is only celebrated in America.
D. Father’s Day is only a trick of the businessmen to make money.
15. What was the first reaction of the British publishing towards Father’s
Day?
A. They thought highly of it and accepted it at once.
B. They just accepted it at once without any hesitation.
C. They just thought it a joke.
D. They thought it was too artificial and took a long time to accept.
Passage 4
Questions 16 to 20 are based on the following passage:
The new global satellite communications systems will offer three kinds service, which may overlap in many different kinds of receivers.
VOICE. Satellite telephones will be able to make calls from anywhere on the Earth to anywhere else. That could make them especially useful to remote, third world villages (some of which already use stationary satellite telephones), explorers and disaster-relief teams. Today’s mobile telephones depend on
earth-bound transmitters, where technical standards vary from country to country. So business travelers cannot use their mobile phones on international trips. Satellite telephones would make that possible.
MESSAGING. Satellite massagers have the same global coverage as satellite telephones, but carry text alone, which could be useful for those with laptop computers. Equipped with a small screen like today’s papers, satellite massagers will also receive short messages.
TRACKING. Voice and messaging systems will also tell their users where they are to within a few hundred meters. Combined with the messaging service, the location service could help rescue teams to find stranded adventurers, the police to find stolen cars, exporters to follow the progress of cargoes, and
haulage companies to check that drivers are not detouring the pub. America’s military Global Positioning System (GPS) satellite will provide better positioning information to anyone who has a receiver for their signals, but GPS does not carry messages, so such a receiver cannot be used on its own for tracking or rescue. By the mid-1990s, GPS receivers will be able to tell people where they are to within 70 meters anywhere in the world, and to within a meter or so in areas where the service is supplemented by ground-based transmitter.
16. Global satellite communications systems will be useful to .
A. laptop computer users
B. remote villages
C. disaster-relief teams
D. all above
17. Satellite telephone will make .
A. business travelers use mobile phones on international trips
B. possible calls from anywhere on earth to anywhere else
C. explorers happy
D. all above
18. Which of the following is true?
A. The positioning precision of the voice system is better than that of
GPS.
B. The positioning precision of GPS is Better than that of the voice
system.
C. The positioning precision of the messaging system is better than of
GPS.
D. The positioning precision of voice system is better than that of the
messaging system.
19. What can we say about the new global satellite communications
systems?
A. They are widely used.
B. They are very helpful.
C. They are costly.
D. Both A and B.
20. Which of the following may be the best title for the passage?
A. Global Satellite Communications
B. New Voice and Messaging System
C. New Generation Satellite
D. Always in Touch
Part III Cloze
Directions: There are twenty blanks in the following passage. For each blank
there are four choices. Choose the one that best fits into the passage and then
marks your answer on the Answer Sheet.
There are two factors which determine an individual’s intelligence. The first
is the sort of brain he is born 61 . Human brains differ considerably, 62 being
more capable than others. 63 no matter how good a brain he has to begin with, an
individual will have a low order of intelligence 64 he has opportunities to
learn. So the second factor is what 65 to the individual—the sort of environment
in which he is brought 66 . If an individual is handicapped (受阻碍) 67 , it is
likely that his brain will 68 to develop and he will 69 attain the level of
intelligence of which he is 70 .
The importance of environment in determining an individual’s intelligence can
be 71 by the case history of the identical twins, Peter and John. When the twins
were three months old, their parents died, and they are placed in 72 foster (寄养)
homes. Peter was reared by parents of low intelligence in an 73 community with
poor educational 74 . John, 75 , was educated in the home of well-to-do parents
who has been to college. This environmental 76 continued until the twins were 77
their late teens, 78 they were given tests to 79 their intelligence. John’s I.Q.
(智商) was 125, twenty-five points higher than the 80 and fully forty points
higher than his identical brother.
61. A. for B. by C. with D. in
62. A. most B. some C. many D. few
63. A. But B. For C. Still D. And
64. A. if B. thought C. as D. unless
65. A. refers B. applies C. happens D. concerns
66. A. about B. up C. forward D. forth
67. A. relatively B. intelligently C. regularly D. environmentally
68. A. fail B. help C. manage D. stop
69. A. ever B. never C. even D. nearly
70. A. able B. capable C. available D. acceptable
71. A. demonstrated B. denied C. neglected D. ignored
72. A. separate B. similar C. remote D. individual
73. A. omitted B. isolated C. enclosed D. occupied
74. A. possibilities B. opportunities C. capacities D. responsibilities
75. A. moreover B. consequently C. then D. however
76. A. exception B. division C. difference D. alteration
77. A. in B. by C. at C. for
78. A. while B. since C. when D. because
79. A. estimate B. count C. decide D. measure
80. A. average B. common C. usual D. ordinary
