单项选择题
What is the sum of the first 1,000 terms of the sequence 0,0,1,2,1,0,0,1.2,1….if the pattern 0,0,1,2,1 is repeated indefinitely()
A. 200
B. 400
C. 800
D. 1,000
E. 4,000
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单项选择题
A linen shop has a certain tablecloth that is available in 8 sizes and 10 colors.What is the maximum possible number of different combinations of size and color available()
A. 9
B. 18
C. 40
D. 80
E. 90
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单项选择题
What is the total number of different 5-digitnumbers that contain all of the digits 2,3,4,7 and 9 and in which none of the odd digits occur next to each other()
A. 12
B. 10
C. 8
D. 6
E. 1
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