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新闻的具体化特征？

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番茄育苗分苗期应在（）

A. 花芽分化前
B. 五片真叶时
C. 现薯时
D. 籽苗期

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心理素质主要包括：（）。

A. 心理过程品质
B. 个性品质
C. 适应性
D. 性格
E. 情感

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You have a use case in your web application that adds several session-scoped attributes. At the end of theuse case， one of these objects， the manager attribute， is removed and then it needs to decide which of theother session-scoped attributes to remove. How can this goal be accomplished？（）

A. The object of the manager attribute should implement the HttpSessionBindingListener and it should call the removeAttribute method on the appropriate session attributes.
B. The object of the manager attribute should implement the HttpSessionListener and it should call the removeAttribute method on the appropriate session attributes.
C. The object of the manager attribute should implement the HttpSessionBindingListener and it should call the deleteAttribute method on the appropriate session attributes.
D. The object of the manager attribute should implement the HttpSessionListener and it should call the deleteAttribute method on the appropriate session attributes.

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属于主体仓库的特点的是（）。

A. 投资大
B. 效率高
C. 成本高
D. 效率低

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