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【单选题】
交流发电机转子作用是( )A.
发出三相交流电动势
B.
产生磁场
C.
变交流为直流
D.
为发动机附件提供动力
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反馈参考答案：
举一反三
【简答题】以实际情况对目标的限制可以把班级管理目标分为( )。A. 主要目标和次要目标 B. 长期目标和短期目标 C.必达目标和争取目标 C. 任务目标和班级建设目标
【单选题】Refer to Figure 12.7. The numerical data show daily profits for each of the two firms when they choose a specific pricing strategy. If both firms follow their individual dominant strategy:
A.
Omega will earn $300 daily profit and Zeta will earn $100 daily profit.
B.
Omega will earn $100 daily profit and Zeta will earn $300 daily profit.
C.
Both will earn $200 daily profit.
D.
Both will earn $150 daily profit.
【简答题】证明核酸是遗传物质的实验有( )、( )、( )。
【单选题】Refer to Figure 12.7 The numerical data show daily profits for each of the two firms when they choose a specific pricing strategy.In the Nash equilibrium:
A.
both firms would a high price.
B.
both firms would charge a low price.
C.
only Zeta would charge a low price.
D.
only Omega would charge a low price.
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