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【单选题】
室内排球比赛场区为长_____米,宽_____米的长方形。A.
16，8
B.
12，6
C.
18，9
D.
15，7.5
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【单选题】A major economic
A.
benefit of fixed exchange rates is that they simplify economic calculations and provide a more predictable basis for decisions that involve international transactions than do floating rates.
B.
benefit of floating exchange rates it that they simplify economic calculations and provide a more predictable basis for decisions that involve international transactions than do fixed rates.
C.
cost of fixed exchange rates it that they simplify economic calculations and provide a more predictable basis for decisions that involve international transactions than do currency board rates.
D.
benefit of flexible exchange rates it that they simplify economic calculations and provide a more predictable basis for decisions that involve international transactions than do crawling peg rates.
E.
benefit of fixed exchange rates is that the value of goods will remain constant across a large region of consumers.
【单选题】通常对气固相放热催化反应而言，下列四种类型的反应器中相对采用较少的类型是( )。
A.
多段绝热式固定床反应器，段间采用间接换热形式
B.
多段绝热式固定床反应器，段问采用直接冷激形式
C.
沸腾床反应器，反应器中设置换热单元
D.
列管换热式反应器，管间采用间接换热的形式
【简答题】[填空(1)] 是个人对自身以及对自己同客观世界的关系的认识。A. 自我意识
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