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【简答题】
有下列两个反应： (1)C 2 H 4 的二聚反应，反应温度为200℃，反应活化能E=156.9kJ/mol (2)C 2 H 6 的二聚反应，反应温度为200℃，反应活化能E=104.6kJ/mol 为使反应速率提高一倍，计算所需提高的温度为多少?并讨论所计算的结果。
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参考答案：
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【单选题】By the last sentence, the writer means that Tom Cruise ______.
A.
is at his best when playing this kind of role
B.
likes the part of Mitch McDeere
C.
is a great American individual
D.
admires the spirit of American individualism
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【单选题】The headmaster told us ____ football in the teaching building.
A.
to not play
B.
not to play
C.
not playing
D.
not played
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【单选题】The boy with two dogs _____ in the yard when the earthquake rocked the city．
A.
is playing
B.
was playing
C.
are playing
D.
were playing
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【多选题】以下对地方菜描述正确的是( )
A.
是中国菜的重要组成部分
B.
选用以当地出产为主的质地优良的烹饪原料
C.
选用本地区独特的烹调方法
D.
具有浓厚的地方风味
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【单选题】下列凭证中,属于外来原始凭证的有( )
A.
领料单
B.
工资结算单
C.
银行进账单
D.
销货发票
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【单选题】Susan will come to watch him ______ at Wimbledon this week.
A.
played
B.
play
C.
to play
D.
playing
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【多选题】下列各项中,属于外来原始凭证的有( ).
A.
飞机行程单
B.
收款方开具的收据
C.
购货发票
D.
银行结算单据
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【多选题】下列各项中,属于外来原始凭证的有( )
A.
职工出差填写的借款单
B.
完工产品入库单
C.
银行转来的结算凭证
D.
出差取得的飞机票
查看完整题目与答案
【单选题】It is very exciting ___________ the whole afternoon ________ with good friend. [     ]
A.
to spend, playing
B.
spend, playing
C.
to spend, to play
D.
spend, to play
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【单选题】功率放大电路的最大输出功率是在输入功率为正弦波时,输出基本不失真的情况下,负载上可能获得的最大( )。
A.
平均功率
B.
直流功率
C.
交流功率
查看完整题目与答案
相关题目：
【单选题】By the last sentence, the writer means that Tom Cruise ______.
A.
is at his best when playing this kind of role
B.
likes the part of Mitch McDeere
C.
is a great American individual
D.
admires the spirit of American individualism
查看完整题目与答案
【单选题】The headmaster told us ____ football in the teaching building.
A.
to not play
B.
not to play
C.
not playing
D.
not played
查看完整题目与答案
【单选题】The boy with two dogs _____ in the yard when the earthquake rocked the city．
A.
is playing
B.
was playing
C.
are playing
D.
were playing
查看完整题目与答案
【多选题】以下对地方菜描述正确的是( )
A.
是中国菜的重要组成部分
B.
选用以当地出产为主的质地优良的烹饪原料
C.
选用本地区独特的烹调方法
D.
具有浓厚的地方风味
查看完整题目与答案
【单选题】下列凭证中,属于外来原始凭证的有( )
A.
领料单
B.
工资结算单
C.
银行进账单
D.
销货发票
查看完整题目与答案
【单选题】Susan will come to watch him ______ at Wimbledon this week.
A.
played
B.
play
C.
to play
D.
playing
查看完整题目与答案
【多选题】下列各项中,属于外来原始凭证的有( ).
A.
飞机行程单
B.
收款方开具的收据
C.
购货发票
D.
银行结算单据
查看完整题目与答案
【多选题】下列各项中,属于外来原始凭证的有( )
A.
职工出差填写的借款单
B.
完工产品入库单
C.
银行转来的结算凭证
D.
出差取得的飞机票
查看完整题目与答案
【单选题】It is very exciting ___________ the whole afternoon ________ with good friend. [     ]
A.
to spend, playing
B.
spend, playing
C.
to spend, to play
D.
spend, to play
查看完整题目与答案
【单选题】功率放大电路的最大输出功率是在输入功率为正弦波时,输出基本不失真的情况下,负载上可能获得的最大( )。
A.
平均功率
B.
直流功率
C.
交流功率
查看完整题目与答案
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