经营风险

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经营风险

考点:证券从业资格考试第二章股票第二章股票题库
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如果方程ax-y=9,2x+3y-1=0,3x-y=7有公共解,求a的值。

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Little _____ abut his own safety, though he was in great danger himself. [ ]

A. does he care

B. did he care

C. he cares

D. he cared

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把公众作为一个过程分类可分为:非公众、潜在公众、知晓公众和( )。

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请你仔细观察漫画,并回答下面的问题:

(1)图中刚进中学的学生,为什么要以书籍作为阶梯走进中学?

                                                                                                                                                             (2)请结合本人的实际,谈谈你走进中学后应该怎样设计自己成长的方案? 

                                                                                                                                                              

                                                                                                                                                              

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牙体缺损修复时,牙体预备的要求哪项不正确

A.去除病变组织
B.开辟修复体所占空间
C.提供良好的固位形和抗力形
D.磨改过小牙或错位患牙
E.无需做预防性扩展

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