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【判断题】
提高科技论文写作能力的首要条件，就是要善于观察分析、积极研究，依靠科学方法，具备较深厚的专业基础。A.
正确
B.
错误
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皮皮学刷刷变学霸
举一反三
【单选题】According to experts, why do people feel the pressure of having a perfect marriage?
A.
Because people fear that their marriage will not be satisfactory.
B.
Because if a marriage ends in divorce, it means that they are a failure.
C.
Because they want to compete with others their happy marriage.
D.
All of them.
【单选题】Why do people like to feel afraid sometimes?
A.
Because fear can feel good.
B.
Because some people are crazy.
【简答题】Why do many people dislike city life? Because they feel__________________________0f living in the city．
【单选题】假设棒球的需求弹性大于供给弹性,对每个棒球征收 3 美元的税收将会使得消费者的价格与未征税前相比上升
A.
0 美元（即消费者价格不变）
B.
3 美元
C.
大于 1.5 美元但小于 3 美元
D.
小于 1.5 美元
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