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偏二甲肼与N 2 O 4 是常用的火箭推进剂，二者发生如下化学反应： (CH 3 ) 2 NNH 2 (l)＋2N 2 O 4 (l)＝2CO 2 (g)＋3N 2 (g)＋4H 2 O(g)      （I） (1)反应（I）中氧化剂是_______。 (2)火箭残骸中棕色气体，原因为：N 2 O 4 (g) 2NO 2 (g) （Ⅱ） 一定温度下，反应（Ⅱ）的焓变为ΔH。现将1 mol N 2 O 4 充入一恒压密闭容器中，下列示意图正确且能说明反应达到平衡状态的是________。 若在相同温度下，上述反应改在体积为1L的恒容密闭容器中进行，平衡常数________（填“增大”“不变”或“减小”），反应3s后NO 2 的物质的量为0.6mol，则0～3s内的平均反应速率v（N 2 O 4 ）＝________mol·L -1 ·s -1 。 (3)NO 2 可用氨水吸收生成NH 4 NO 3 。25℃时，将amol NH 4 NO 3 溶于水，溶液显酸性，原因是_____ _______________________________________________（用离子方程式表示）。向该溶液滴加bL氨水后溶液呈中性，则滴加氨水的过程中的水的电离平衡将______（填“正向”“不”或“逆向”）移动，所滴加氨水的浓度为_______mol·L -1 。（NH 3 ·H 2 O的电离平衡常数取K b ＝2×10 -5 mol·L -1 ，假设溶液的体积是bL）
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A.
As you wish
B.
You're welcome
C.
Hurry up
D.
Not likely
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【单选题】You can ______us in the discussion if you ______.
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join,wish to
B.
join in,want to
C.
attend,don't want to
D.
take part in , hope so
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【单选题】按所用材料和受力特点，基础分为刚性和柔性两类，()属于刚性基础。
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钢筋混凝土板式基础和条形基础
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【单选题】If you wish to join our committee and ________for the betterment of the whole school, please register in the Admission Office. [    ]
A.
offer
B.
present
C.
propose
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volunteer
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【单选题】Once you compile the code, you need to ________ it in the server to access the service.
A.
employ
B.
align
C.
comply
D.
deploy
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【单选题】3 Q1: Which of the following statements is false?
A.
The javac command can compile multiple classes at once; simply list the source-code filenames after the command with each filename separated by a comma from the next.
B.
If the directory containing the app includes only one app’s files, you can compile all of its classes with the command javac *.java.
C.
The asterisk (*) in javac *.java indicates that all files in the current directory ending with the filename extension .java should be compiled.
D.
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【单选题】You can _____ us in the reading if you _____. [     ]
A.
join; wish to
B.
join in; want to join
C.
take part in; hope so
D.
attend; don't want to
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【判断题】If you wish to join a fraternity or sorority, it’s by invitation only and you may join more than one.
A.
正确
B.
错误
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【单选题】—Shall we ask Diana if she'd like to join in the party tonight? —________. I'd like her to join us.
A.
As you wish
B.
You're welcome
C.
Hurry up
D.
Not likely
查看完整题目与答案
【单选题】Once you compile the code, you need to ________ it in the server to access the service.
A.
employ
B.
deploy
C.
align
D.
comply
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【单选题】(2013·黑龙江四校高三联考)—Shall we ask Diana if she'd like to join in the party tonight? —________. I'd like her to join us.
A.
As you wish
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You're welcome
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Hurry up
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【单选题】If you wish to join our committee and ________for the betterment of the whole school, please register in the Admission Office. [    ]
A.
offer
B.
present
C.
propose
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volunteer
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【单选题】Once you compile the code, you need to ________ it in the server to access the service.
A.
employ
B.
align
C.
comply
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【单选题】3 Q1: Which of the following statements is false?
A.
The javac command can compile multiple classes at once; simply list the source-code filenames after the command with each filename separated by a comma from the next.
B.
If the directory containing the app includes only one app’s files, you can compile all of its classes with the command javac *.java.
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D.
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【单选题】You can _____ us in the reading if you _____. [     ]
A.
join; wish to
B.
join in; want to join
C.
take part in; hope so
D.
attend; don't want to
查看完整题目与答案
【判断题】If you wish to join a fraternity or sorority, it’s by invitation only and you may join more than one.
A.
正确
B.
错误
查看完整题目与答案
【单选题】—Shall we ask Diana if she'd like to join in the party tonight? —________. I'd like her to join us.
A.
As you wish
B.
You're welcome
C.
Hurry up
D.
Not likely
查看完整题目与答案
【单选题】Once you compile the code, you need to ________ it in the server to access the service.
A.
employ
B.
deploy
C.
align
D.
comply
查看完整题目与答案