单项选择题

An identification code read from left to right consists of 2 digits，a dash，3 digits，a dash，and then 4 digits．Each digit can be any number from 0 through 9.（）

A. if the quantity in Column A is greater;
B. if the quantity in Column B is greater;
C. if the two quantities are equal;
D. if the relationship cannot be determined from the information given.

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单项选择题

（）

A. if the quantity in Column A is greater;
B.if the quantity in Column B is greater;
C. if the two quantities are equal;
D. if the relationship cannot be determined from the information given.

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