多项选择题
“三北”防护林体系中“三北”是指()。
A.东北
B.华北
C.西北
D.长城以北
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单项选择题
As we have only moderate means at hand, the tie-up of funds for ______ three to four months indeed presents a problem to us. A.as soon as B.as far as C.as long as D.as well as
A.
B.as
C.as
D.as
E.as
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单项选择题
童年期儿童游戏属于()。
A.互动游戏
B.象征性游戏
C.实物游戏
D.规则游戏
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