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(1)由“若ab=ac(a≠0，a，b，c∈R)，则b=c”；类比“若 （ 为三个向量），则 ”； （2）如果 ，那么 ； （3）若回归直线方程为 1.5x+45，x∈{1,5,7,13,19}，则 =58.5； （4）当n为正整数时，函数N（n）表示n的最大奇因数，如N（3）=3，N（10）=5， ，由此可得函数N（n）具有性质：当n为正整数时，N（2n）= N（n），N（2n-1）=2n-1． 上述四个推理中，得出结论正确的是 （写出所有正确结论的序号）.
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参考答案：
举一反三
【单选题】What are players’ strategies?
A.
player 1’s strategies are: a, b; player 2’s strategies are x, y
B.
player 1’s strategies are: aa, ab, ba, bb; player 2’s strategies are x, y
C.
Player 1’s strategies are: a, b; player 2’s strategies are xx, xy, yx, yy
D.
player 1’s strategies are: aa, ab, ba, bb; player 2’s strategies are xx, xy, yx, yy
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运输的量较小，运输成本较高
B.
运行持续性较差
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掌握车辆的驾驶技术较容易
D.
在长途运输中，运送速度较快
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【单选题】一 What's your favourite ______? 一 Red. [     ]
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animal
B.
food
C.
sport
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colour
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【单选题】English learning strategies including resource strategies， communication strategies， ebntrol strategies and
A.
cognitive strategies
B.
time strategies
C.
administrative strategies
D.
interpersonal strategies
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【单选题】Which of the following strategies does not belong to English learning strategies?
A.
Cognitive strategies.
B.
Interpersonal strategies.
C.
Resource strategies.
D.
Communication strategies.
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【单选题】What are the strategies of IMC? ( ).
A.
Marketing strategies on materials pool
B.
Integration on advertising strategy
C.
Management strategies on brand contacting point
D.
All above
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【单选题】3 general strategies for gaining a competitive advantage are cost-leading strategies, differentiation strategies, and ( )
A.
Overall strategy
B.
Centralized strategies
C.
Business strategy
D.
Functional strategy
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【单选题】Which of the following strategies does the man use to deal with the difficult security guard?
A.
fighting back and cooling down finally
B.
walking away to avoid arguing
C.
doing everything possible to make the other party happy
D.
changing his attitude, looking at the problem in a different way
查看完整题目与答案
【单选题】下列哪项不是公路运输的特点( )。
A.
运输的量较小，运输成本较高
B.
运行持续性较差
C.
掌握车辆的驾驶技术较容易
D.
在长途运输中，运行速度较快
查看完整题目与答案
【单选题】Focus strategies are
A.
sheltered from the risks associated with industry-wide strategies because of their niche focus.
B.
able to avoid global risk by focusing on niches in national or regional markets.
C.
faced with additional   types of risks than are industry-wide strategies.
D.
more subject to failure than industry-wide strategies.
查看完整题目与答案
相关题目：
【单选题】What are players’ strategies?
A.
player 1’s strategies are: a, b; player 2’s strategies are x, y
B.
player 1’s strategies are: aa, ab, ba, bb; player 2’s strategies are x, y
C.
Player 1’s strategies are: a, b; player 2’s strategies are xx, xy, yx, yy
D.
player 1’s strategies are: aa, ab, ba, bb; player 2’s strategies are xx, xy, yx, yy
查看完整题目与答案
【单选题】下列哪项不是公路运输的特点 ( )
A.
运输的量较小，运输成本较高
B.
运行持续性较差
C.
掌握车辆的驾驶技术较容易
D.
在长途运输中，运送速度较快
查看完整题目与答案
【单选题】一 What's your favourite ______? 一 Red. [     ]
A.
animal
B.
food
C.
sport
D.
colour
查看完整题目与答案
【单选题】English learning strategies including resource strategies， communication strategies， ebntrol strategies and
A.
cognitive strategies
B.
time strategies
C.
administrative strategies
D.
interpersonal strategies
查看完整题目与答案
【单选题】Which of the following strategies does not belong to English learning strategies?
A.
Cognitive strategies.
B.
Interpersonal strategies.
C.
Resource strategies.
D.
Communication strategies.
查看完整题目与答案
【单选题】What are the strategies of IMC? ( ).
A.
Marketing strategies on materials pool
B.
Integration on advertising strategy
C.
Management strategies on brand contacting point
D.
All above
查看完整题目与答案
【单选题】3 general strategies for gaining a competitive advantage are cost-leading strategies, differentiation strategies, and ( )
A.
Overall strategy
B.
Centralized strategies
C.
Business strategy
D.
Functional strategy
查看完整题目与答案
【单选题】Which of the following strategies does the man use to deal with the difficult security guard?
A.
fighting back and cooling down finally
B.
walking away to avoid arguing
C.
doing everything possible to make the other party happy
D.
changing his attitude, looking at the problem in a different way
查看完整题目与答案
【单选题】下列哪项不是公路运输的特点( )。
A.
运输的量较小，运输成本较高
B.
运行持续性较差
C.
掌握车辆的驾驶技术较容易
D.
在长途运输中，运行速度较快
查看完整题目与答案
【单选题】Focus strategies are
A.
sheltered from the risks associated with industry-wide strategies because of their niche focus.
B.
able to avoid global risk by focusing on niches in national or regional markets.
C.
faced with additional   types of risks than are industry-wide strategies.
D.
more subject to failure than industry-wide strategies.
查看完整题目与答案
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