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【简答题】
(每空 2 分,共 12 分)已知: NaHSO 4 ( 水溶液 ) Na + +H + +SO 4 2- , NaHSO 4 ( 熔融 ) Na + +HSO 4 - 现有 以下物质 1 BaCl 2 、 2 NaHSO 4 、 3 KOH 、 4 N H 4 Cl 、 5 冰,按下列要求回答: (1) 熔化时不需要破坏化学键的是 ________( 填写物质的序号,下同 ) ,熔化时 既 破坏 离子键,又破坏 共价键的是 ________ , 溶于水时 破坏 离子键,又破坏 共价键的是 ________ 。( 不考虑水解 ) (2) 只含一种化学键的 物质是 ________ 。 (3) 用电子式表示下列离子化合物的形成过程: 1 BaCl 2 : ___________________________________ 2 H 2 O : ____________________________________
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参考答案：
举一反三
【判断题】三1 运行机构 , 使起重机械或起重小车沿地面或轨道运行
A.
正确
B.
错误
查看完整题目与答案
【单选题】According to the passage, all of the following are the causes for the population explosion in China except ______.
A.
better life
B.
decreased death rate
C.
better education
D.
better health
查看完整题目与答案
【单选题】One implication in this passage is that ______.
A.
all RDAs have been established
B.
not all RDAs have been established yet
C.
it's not important to know RDAs
D.
RDAs are necessary only for sick people
查看完整题目与答案
【单选题】下列哪种遗嘱形式不需要证人在场见证即为有效?（ ）
A.
口头遗嘱
B.
录音遗嘱
C.
代书遗嘱
D.
自书遗嘱
查看完整题目与答案
【单选题】The passage is written for all the purposes EXCEPT ______.
A.
introducing music from all over the world
B.
advertising Osaka Yusen Broadcasting
C.
suggesting listening to Osaka Yusen Broadcasting
D.
introducing a variety of radio channels
查看完整题目与答案
【单选题】下列哪种遗嘱形式不需要证人在场见证即为有效?()
A.
口头遗嘱
B.
录音遗嘱
C.
自书遗嘱
D.
代书遗嘱
查看完整题目与答案
【简答题】朗读诗歌并标记每一行的音节总数 1) A Nation’s Strength —By Ralph Waldo Emerson Not gold, but only man can make A people great and strong; Men who, for truth and honor’s sake, Stand fast and suffer long. Brave men who...
查看完整题目与答案
【单选题】重托行走时应( )
A.
左手托盘，托盘的一半重量应放在肩上
B.
右手 托盘，托盘的一半重量应放在肩上
C.
左手托盘，盘底不触肩
D.
右 手托盘，盘底不触肩
查看完整题目与答案
【单选题】 下列透明塑料中,一般情况下,( )的冲击强度最大。
A.
PS
B.
PC
C.
PMMA
D.
PET
查看完整题目与答案
【单选题】The passage suggests that ________
A.
all the native Indians built trunk walls all around their houses
B.
all the native Indian houses were built with poles tied together
C.
the Iroquois Indians took safety into account while building their wigwams
D.
the Choctaw Indians in Mississippi built their wigwams with straight sides and ends
查看完整题目与答案
相关题目：
【判断题】三1 运行机构 , 使起重机械或起重小车沿地面或轨道运行
A.
正确
B.
错误
查看完整题目与答案
【单选题】According to the passage, all of the following are the causes for the population explosion in China except ______.
A.
better life
B.
decreased death rate
C.
better education
D.
better health
查看完整题目与答案
【单选题】One implication in this passage is that ______.
A.
all RDAs have been established
B.
not all RDAs have been established yet
C.
it's not important to know RDAs
D.
RDAs are necessary only for sick people
查看完整题目与答案
【单选题】下列哪种遗嘱形式不需要证人在场见证即为有效?（ ）
A.
口头遗嘱
B.
录音遗嘱
C.
代书遗嘱
D.
自书遗嘱
查看完整题目与答案
【单选题】The passage is written for all the purposes EXCEPT ______.
A.
introducing music from all over the world
B.
advertising Osaka Yusen Broadcasting
C.
suggesting listening to Osaka Yusen Broadcasting
D.
introducing a variety of radio channels
查看完整题目与答案
【单选题】下列哪种遗嘱形式不需要证人在场见证即为有效?()
A.
口头遗嘱
B.
录音遗嘱
C.
自书遗嘱
D.
代书遗嘱
查看完整题目与答案
【简答题】朗读诗歌并标记每一行的音节总数 1) A Nation’s Strength —By Ralph Waldo Emerson Not gold, but only man can make A people great and strong; Men who, for truth and honor’s sake, Stand fast and suffer long. Brave men who...
查看完整题目与答案
【单选题】重托行走时应( )
A.
左手托盘，托盘的一半重量应放在肩上
B.
右手 托盘，托盘的一半重量应放在肩上
C.
左手托盘，盘底不触肩
D.
右 手托盘，盘底不触肩
查看完整题目与答案
【单选题】 下列透明塑料中,一般情况下,( )的冲击强度最大。
A.
PS
B.
PC
C.
PMMA
D.
PET
查看完整题目与答案
【单选题】The passage suggests that ________
A.
all the native Indians built trunk walls all around their houses
B.
all the native Indian houses were built with poles tied together
C.
the Iroquois Indians took safety into account while building their wigwams
D.
the Choctaw Indians in Mississippi built their wigwams with straight sides and ends
查看完整题目与答案
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