At that time work was restricted to slaves and to those few

At that time work was restricted to slaves and to those few poor citizens who co

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If he told his wife about their plan, she was bound to agre

If he told his wife about their plan, she was bound to agree.A.would unnecessar

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简述传染病的特性。

简述传染病的特性。

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肺炎是学前儿童常见病,多发病,各种年龄都会患肺炎,但在(   )以下小儿中特别多见。

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广义的学习指人和动物在生活过程中,(凭借经验)而产生的行为或行为潜能的相对(  )

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