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【单选题】
(2015)用列举法表示“大于3且小于10的奇数的全体”构成的集合是A.
∅
B.
{5, 7, 9}
C.
{4, 6, 8)
D.
{4, 5, 6, 7, 8, 9}
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【单选题】Passage 2Italians smoke seven thousand million cigarettes every year (1987 figures). This is roughly the equivalent of 5,195 cigarettes a year for every person in the country of 20 years of age or mor...
A.
Cigarette smoking appears to have a much greater effect than cigar or pipe smoking.
B.
Current research indicates a causal relationship between all forms of smoking and cancer of blood.
C.
All tobacco smoking affects life expectancy and health.
D.
Filters （过滤嘴） and low tar tobacco are claimed to make smoking to some extent safer.
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【单选题】（68)D 所对应的二进制数和 8421BCD 码为
A.
0100010B，（01101000）8421BCD
B.
01000100B，（01101）8421BCD
C.
01000100B，（01101000）8421BCD
D.
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【单选题】Passage 2Italians smoke seven thousand million cigarettes every year (1987 figures). This is roughly the equivalent of 5,195 cigarettes a year for every person in the country of 20 years of age or mor...
A.
About seven thousand million Italians smoke cigarettes every year.
B.
5,195 cigarettes are smoked every year in America.
C.
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D.
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【单选题】Passage 2Italians smoke seven thousand million cigarettes every year (1987 figures). This is roughly the equivalent of 5,195 cigarettes a year for every person in the country of 20 years of age or mor...
A.
gases
B.
vaporized chemicals
C.
minute particles of ash
D.
water
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