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【单选题】
下列函数中既是奇函数，又在（0，+∞）上单调递减的是（ ）A.
y=x -1 -x
B.
y=x -2 -x
C.
y=ln（2 x ）
D.
y=-x 3 +1
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反馈参考答案：
举一反三
【简答题】铸铁是指碳的质量分数大于（）%ωc的（）合金。
【单选题】C5. Planning is concerned with ________.
A.
ends only
B.
means only
C.
neither ends nor means
D.
both ends and means
【单选题】'The old verities' labeled by William Fanlkner must refer to ______.
A.
the past ways for ruling a society
B.
the society's established virtues
C.
the out-of-date moral conducts
D.
the previous legal systems
【单选题】'The old verifies' labeled by William Faulkner must refer to ______.
A.
the past ways for ruling a society
B.
the society's established virtues
C.
the out-of-date moral conducts
D.
the previous legal systems
【单选题】C5. Which of the following is NOT a function of planning?
A.
defining goals
B.
identifying a strategy for attaining goals
C.
settling disputes between employees
D.
coordinating organizational activities
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