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【简答题】
如果等差数列 中， ，那么 .
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举一反三
【单选题】If x is an integer and x2<37, what is the greatest possible value of x minus the least possible value of x ?
A.
5
B.
6
C.
10
D.
12
E.
36
【单选题】According to the professor, what is the greatest advantage of hydroponics?
A.
The plants are less likely to develop soil-borne diseases.
B.
The cultivation requires much less labor than traditional methods.
C.
The water can be recycled in a hydroponic environment.
D.
Less space is needed to produce a large number of plants.
【简答题】What is the greatest positive integer x such that 2x is a factor of 1210?
【多选题】管理者在绩效辅导过程中所扮演的“教练”角色的任务包括（ ）。
A.
对员工进行指导
B.
监控员工的工作过程
C.
培养员工工作中所需要的技巧和能力
D.
设计考核指标
E.
接受绩效申诉
【单选题】The sum of n different positive integers is less than 100. What is the greatest possible value of n?
A.
10
B.
11
C.
12
D.
13
E.
14
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