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If 1< d <2 , is the tenths digit of decimal representation of d equal to 9 ?
(1)d+0.01< 2
(2)d+0.05>2
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d在1-2之间，要求证d的十分位（小数点后面一位）是否等于9
1 - THOUSANDS
2 - HUNDREDS
3 - TENS
4 - UNITS
. - decimal point
5 - TENTHS
6 - HUNDREDTHS
7 - THOUSANDTHS（1）d+0.01<2
d<1.99,那么1<d<1.99, 只要在这个范围内，加0.01都小于2.
（2）d+0.05>2
d>1.95,那么1.95<d<2，所以d的十分位一定是9.
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数据充分DS
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GMAT难题300合集
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