9. The areas, called "plaques", gradually thicken and harden with fibrous material, cells, and other deposits, restricting the opening of the vessel and reducing blood flow in the tissues, a condition known as "______".
2. Concerns have recently been voiced that the drugs elicit unexpected cognitive side effects, such as memory loss, fuzzy thinking and learning difficulties.
Part Ⅱ Cloze Recent studies of the human brain have resulted in some interesting discoveries. Scientists believe that a way to improve the power of the brain may soon be possible. Scientists have discovered that the brain can make its own drugs. The brain 1 a protein substance which can act directly 2 the brain to change aspects of mental activity. Some may change or improve, for example, creativity, intelligence, imagination, and good 3 . Chemicals found in the brain 4 messages. In recent years scientists have found chemicals that 5 mood, memory and other happenings of the mind. About 25 have been found 6 . Today the role of chemicals and the protein substance in human behavior is creating much interest. Research seems to show that they may help 7 insomnia, pain, and mental illness. They have a great 8 to stimulate the brain to 9 deficiencies. They also improve the qualities of memory and learning already in the brain. They 10 the secret on mood and emotion. Some day there may be a chemical way to create a better and more efficient brain.
[解析] 本句的Some指代的是前一句的aspects of mental activity。选项中符合大脑活动的只有记忆memory。
4.
A.obtain
B.accept
C.carry
D.receive
A B C D
C
[解析] 本句的意思是“大脑中的化学物质携带信息”。因此选carry,意为“携带”。
5.
A.approach
B.affect
C.aid
D.apply
A B C D
B
[解析] 本句的意思是“近年来科学家发现了可以影响情绪、记忆和其他大脑内发生的事的化学物质”。
6.
A.so many
B.so much
C.so far
D.so good
A B C D
C
[解析] 本句的意思是“迄今为止发现了大约25种化学物质”。
7.
A.conceal
B.compress
C.confine
D.control
A B C D
D
[解析] 本句的意思是“研究似乎表明它们有助于控制失眠、疼痛和精神疾病”。
8.
A.courage
B.capacity
C.authority
D.curiosity
A B C D
B
[解析] 本句的意思是“它们有一种巨大的能力可以刺激大脑克服缺陷。”
9.
A.contain
B.contest
C.conquer
D.condemn
A B C D
C
[解析] 参见上一小题解释,有“克服”之意的只有选项C。
10.
A.held
B.hold
C.are holding
D.will hold
A B C D
B
[解析] 根据上一句,这里的时态应该用一般现在时。
Are some people born clever and others born stupid? Or is intelligence developed by our environment and our experience? Strangely 11 , the answer to both these questions is yes. To some extent our intelligence is given us at birth, and no amount of special education can make a genius 12 a child born with low intelligence. On the other hand, a child who lives in a boring environment will develop his intelligence less than one who lives in rich and varied surroundings. Thus the 13 of a person's intelligence are fixed at birth, but whether or not he reaches those limits will depend on his 14 . This view, now held by most experts, can be supported in a number of ways. It is easy to show that intelligence is to some extent 15 we are born with. The closer the blood relationships between two people, the closer they are likely to be in intelligence. Thus if we take two unrelated people 16 from the population, it is likely that their degrees of intelligence will be completely different. If on the other hand we take two identical twins, they will very likely be as intelligent as each other. Relations like brothers and sisters, parents and children, usually have 17 intelligence, and this clearly suggests that intelligence depends on birth. 18 now that we take two identical twins and put them in different environments. We might send one, for example, to a university and the other to a factory where the work is boring. We would soon find differences in intelligence developing, and this indicates that environment 19 birth plays a part. This conclusion is also suggested by the 20 that people who live in close contact with each other, but who are not related at all, are likely to have similar degrees of intelligence.