There are two types of twins: identical and non-identical twins. Identical twins are formed from a single egg in mother's body which divides to form. two separate babies. Identical twins look the same and are often dressed by their parents in clothes of t
题目
There are two types of twins: identical and non-identical twins. Identical twins are formed from a single egg in mother's body which divides to form. two separate babies. Identical twins look the same and are often dressed by their parents in clothes of the same colors. It is often difficult to tell identical twins from each other, even when they are standing side by side. Non-identical twins come into being when the mother produces two separated eggs at the same time, both of which grow to form. babies. In this case the twins look like normal brothers and sisters and are easy to tell one from the other.
In the 1970s and 1980s a scientist did some research into twins. He invited many pairs of identical twins to university and asked them to take part in a week of tests. He was particularly interested in adopted (收养) twins who had been separated at birth. He would give the twins different kinds of tests to study their speed of thinking, their speech, their memory, the ways they saw and heard different things, and so on. Time and time again he found separated twins who preferred clothes of the same color, used the same kind of shaving soap, wore the same shaped square glasses and the same colored socks.
There is a third type of twins, but it is a very unusual one. Twins who are joined together at birth are known in western countries as Siamese twins.
(1)It is difficult to tell identical twins because ____________.
A、they are dressed in the same clothes
B、they are dressed in the same color
C、they are very alike
D、they are standing side by side
(2)If the twins are easy to tell from each other, they are ____________.
A、very probably non-identical twins
B、surely non-identical twins
C、surely identical twins
D、always a brother and a sister
(3)Which of the following is NOT true according to this passage?
A、In the 1970s and 1980s a scientist did some research into the two main types of twins.
B、In the week of tests, he tested their speed of thinking, their speech, their memory and some other things.
C、There were twins who had been separated from each other as soon as they were born.
D、Very often, separated twins were found to choose things of the same kind, the same shape and the same color.
(4)According to the passage, how many types of twins are there actually?
A、one
B、two
C、three
D、four
(5)This passage mainly tells us ____________.
A、the main types of twins
B、what has been found out about twins
C、how twins are formed
D、how a scientist studied twins
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第1题：
共用题干
第一篇
Ulcers
Even though ulcers appear to run in families,lifestyle plays more of a role than genetic
（基因的）factors in causing the illness, according to a report in the April 13th issue of
Journal of Internal Medicine. In particular,smoking and stress in men and the regular use
of pain-releasing medicines in women were linked with an increased risk of developing an
ulcer（溃疡）.
Overall,61% of ulcer risk appears to be due to environmental factors,such as
smoking,and the remaining 39% is due to genes,according to Dr. lsmo Raiha of the
University of Turkey and colleagues at the University of Helsinki,Finland.Some
researchers had suggested that families may spread Helicobacteria pyloni（幽门螺旋菌）,
the bacteria（细菌）that can cause ulcers. However, the new study suggests this is
unlikely,according to the report.
Raiha and colleagues studied data from more than 13,000 pairs of twins to examine
the roles of genetic and environmental factors in the origin of ulcer. Both twins were more
likely to develop an ulcer if the pain were genetically the same as compared with a pair of
fraternal（由两受精卵发育而成的）twins , suggesting that there must be some genetic
susceptibility（敏感性）to ulcer development.
However,the risk was no greater in twins living together compared with twins living
apart,suggesting that shared exposure to H.pyloni was not to blame." Environmental
effects were not due to factons shared by family members,and they were related to smoking
and stress in men and the use of pain-releasing medicines in women,"the authors write in
their report.In the last paragraph,the word"suggesting"could be best replaced by
A:assuming.
B:implying.
C:proposing.
D:believing.答案：D解析： -
第2题：
共用题干
第一篇
Ulcers
Even though ulcers appear to run in families,lifestyle plays more of a role than genetic
（基因的）factors in causing the illness, according to a report in the April 13th issue of
Journal of Internal Medicine. In particular,smoking and stress in men and the regular use
of pain-releasing medicines in women were linked with an increased risk of developing an
ulcer（溃疡）.
Overall,61% of ulcer risk appears to be due to environmental factors,such as
smoking,and the remaining 39% is due to genes,according to Dr. lsmo Raiha of the
University of Turkey and colleagues at the University of Helsinki,Finland.Some
researchers had suggested that families may spread Helicobacteria pyloni（幽门螺旋菌）,
the bacteria（细菌）that can cause ulcers. However, the new study suggests this is
unlikely,according to the report.
Raiha and colleagues studied data from more than 13,000 pairs of twins to examine
the roles of genetic and environmental factors in the origin of ulcer. Both twins were more
likely to develop an ulcer if the pain were genetically the same as compared with a pair of
fraternal（由两受精卵发育而成的）twins , suggesting that there must be some genetic
susceptibility（敏感性）to ulcer development.
However,the risk was no greater in twins living together compared with twins living
apart,suggesting that shared exposure to H.pyloni was not to blame." Environmental
effects were not due to factons shared by family members,and they were related to smoking
and stress in men and the use of pain-releasing medicines in women,"the authors write in
their report.61% of ulcer risk seems to be caused by
A:unknown factors.
B:economic factors.
C:environmental factors.
D:genetic factors.答案：C解析： -
第3题：
共用题干
第一篇
Ulcers
Even though ulcers appear to run in families,lifestyle plays more of a role than genetic
（基因的）factors in causing the illness, according to a report in the April 13th issue of
Journal of Internal Medicine. In particular,smoking and stress in men and the regular use
of pain-releasing medicines in women were linked with an increased risk of developing an
ulcer（溃疡）.
Overall,61% of ulcer risk appears to be due to environmental factors,such as
smoking,and the remaining 39% is due to genes,according to Dr. lsmo Raiha of the
University of Turkey and colleagues at the University of Helsinki,Finland.Some
researchers had suggested that families may spread Helicobacteria pyloni（幽门螺旋菌）,
the bacteria（细菌）that can cause ulcers. However, the new study suggests this is
unlikely,according to the report.
Raiha and colleagues studied data from more than 13,000 pairs of twins to examine
the roles of genetic and environmental factors in the origin of ulcer. Both twins were more
likely to develop an ulcer if the pain were genetically the same as compared with a pair of
fraternal（由两受精卵发育而成的）twins , suggesting that there must be some genetic
susceptibility（敏感性）to ulcer development.
However,the risk was no greater in twins living together compared with twins living
apart,suggesting that shared exposure to H.pyloni was not to blame." Environmental
effects were not due to factons shared by family members,and they were related to smoking
and stress in men and the use of pain-releasing medicines in women,"the authors write in
their report.The report attributes the risk of men developing an ulcer partly to
A:smoking and stress.
B:the kinds of food they eat.
C:the size of the family.
D:the use of certain medicines.答案：A解析： -
第4题：
共用题干
第一篇
Ulcers
Even though ulcers appear to run in families,lifestyle plays more of a role than genetic
（基因的）factors in causing the illness, according to a report in the April 13th issue of
Journal of Internal Medicine. In particular,smoking and stress in men and the regular use
of pain-releasing medicines in women were linked with an increased risk of developing an
ulcer（溃疡）.
Overall,61% of ulcer risk appears to be due to environmental factors,such as
smoking,and the remaining 39% is due to genes,according to Dr. lsmo Raiha of the
University of Turkey and colleagues at the University of Helsinki,Finland.Some
researchers had suggested that families may spread Helicobacteria pyloni（幽门螺旋菌）,
the bacteria（细菌）that can cause ulcers. However, the new study suggests this is
unlikely,according to the report.
Raiha and colleagues studied data from more than 13,000 pairs of twins to examine
the roles of genetic and environmental factors in the origin of ulcer. Both twins were more
likely to develop an ulcer if the pain were genetically the same as compared with a pair of
fraternal（由两受精卵发育而成的）twins , suggesting that there must be some genetic
susceptibility（敏感性）to ulcer development.
However,the risk was no greater in twins living together compared with twins living
apart,suggesting that shared exposure to H.pyloni was not to blame." Environmental
effects were not due to factons shared by family members,and they were related to smoking
and stress in men and the use of pain-releasing medicines in women,"the authors write in
their report.Raiha and colleagues found environmental effects related to all the following factors EXCEPT
A:the regular use of pain-releasing medicines.
B:shared exposure to H.pyloni.
C:smoking.
D:stress.答案：B解析： -
第5题：
共用题干
第一篇
Ulcers
Even though ulcers appear to run in families,lifestyle plays more of a role than genetic
（基因的）factors in causing the illness, according to a report in the April 13th issue of
Journal of Internal Medicine. In particular,smoking and stress in men and the regular use
of pain-releasing medicines in women were linked with an increased risk of developing an
ulcer（溃疡）.
Overall,61% of ulcer risk appears to be due to environmental factors,such as
smoking,and the remaining 39% is due to genes,according to Dr. lsmo Raiha of the
University of Turkey and colleagues at the University of Helsinki,Finland.Some
researchers had suggested that families may spread Helicobacteria pyloni（幽门螺旋菌）,
the bacteria（细菌）that can cause ulcers. However, the new study suggests this is
unlikely,according to the report.
Raiha and colleagues studied data from more than 13,000 pairs of twins to examine
the roles of genetic and environmental factors in the origin of ulcer. Both twins were more
likely to develop an ulcer if the pain were genetically the same as compared with a pair of
fraternal（由两受精卵发育而成的）twins , suggesting that there must be some genetic
susceptibility（敏感性）to ulcer development.
However,the risk was no greater in twins living together compared with twins living
apart,suggesting that shared exposure to H.pyloni was not to blame." Environmental
effects were not due to factons shared by family members,and they were related to smoking
and stress in men and the use of pain-releasing medicines in women,"the authors write in
their report.The purpose of the research on twins by Raiha and colleagues was to examine
A:the relationship between family members.
B:the effect of pain-releasing medicines.
C:the roles of genetic and environmental factors in the origin of ulcer.
D:the symptoms of ulcer.答案：C解析： -
第6题：
Children who have negative relationships with their parents often develop______problems including low academic achievement，negative social relationships，and delinquency。A.domestic
B.influential
C.diverse
D.identical答案：C解析：本题考查形容词辨析。题目意为“与父母有消极关系的孩子往往会出现许多问题，包括学业成绩低下、社会关系消极和犯罪等。”A选项“国内的，家庭的”，B选项“有影响的，有势力的”，C选项“不同的，多种多样的”，D选项“同一的，多种多样的”。根据句意，和父母关系消极的孩子会出现各种各样的问题，选项C正确。