单选题：According to the passage, the writer looks upon the anti-smo

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题目类型：单选题
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题目内容：

According to the passage, the writer looks upon the anti-smoking wall-builders' actions__________． A．optimisticall
B．pessimisticall
C．unconcernedl
D．skepticall

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所得材料自然、真实的一种研究方法是（　　）。

所得材料自然、真实的一种研究方法是（　　）。A．问卷法 B．谈话法 C．观察法 D．实验法

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简述4～5岁儿童心理发展的主要特征。

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根据以下资料，回答题。One characteristic of weather maps not mentioned

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Scientists cannot accurately predict the course of a hurricane due to __________

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