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答案：
A
Arithmetic P
The greatest integer that is less than or equal to −1.6 is −2. It cannot be −1 because −1 is greater than −1.6. The greatest integer that is less than or equal to 3.4 is 3. It cannot be 4 because 4 is greater than 3.4. The greatest integer that is less than or equal to 2.7 is 2. It cannot be 3 because 3 is greater than 2.7. Therefore, = −2 + 3 + 2 = 3.
The correct answer is A.
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