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【简答题】
X、Y、Z、W均为10电子的分子或离子。X有5个原子核。通常状况下，W为无色液体。它们之间转化关系如图所示，请回答： （1）工业上每制取1molZ要放出46.2 kJ的热量，写出该反应的热化学方程式： 。 （2）工业制取Z的化学平衡常数K与T的关系如下表： T/K 298 398 498 …… K/(mol·L —1 ) —2 4.1×10 6 K 1 K 2 …… 请完成下列问题： ①试比较K 1 、K 2 的大小，K 1 K 2 （填写“>”“=”或“②恒温固定体积的容器中，下列各项能作为判断该反应达到化学平衡状态的依据的是 （填序号字母）。 A．容器内各物质的浓度之比为化学计量数比 B．混合气体密度保持不变 C．容器内压强保持不变 D．混合气体相对分子质量保持不变 （3）某化学小组同学模拟工业生产制取HNO 3 ，设计下图所示装置，其中a为一个可持续鼓入空气的橡皮球。 ①A中发生反应的化学方程式是 。 ②B中浓H 2 SO 4 的作用是 。 （4）写出D装置中反应的化学方程式 。 （5）a中通入空气的作用 。
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【简答题】撕纸的过程是注重手、 、 协调并用参与的过程。
【单选题】1The Book of History,
A.
A monumental work in the form of individual biography, recording Chinese history from the time of legendary figure Emperor Huang to the Han Dynasty in 130 chapters.
B.
The first comprehensive historical account of the major political, social and military events of the Spring and Autumn period, setting the first widely imitated prose model
C.
The earliest chronicle in China with concise and meticulous language
D.
the most ancient collection of Chinese prose writings with fragments of disconnected and diverse individual official papers.
【单选题】For each paragraph put the italicized sentence into one of the three positions marked (A), (B), and (C). In addition, researchers can synthesize chemical compounds. (A)Plants, animals, and other organ...
A.
(A)
B.
(B)
C.
(C)
【简答题】habitats vocabulary manuscript proximity take...into consideration meticulous She is person who is ____1____ about her appearance. This is a nomadic tribe who often founds ____2______ in different p...
【单选题】Zuo’s Commentary
A.
The first comprehensive historical account of the major political, social and military events of the Spring and Autumn period, setting the first widely imitated prose model
B.
A monumental work in the form of individual biography, recording Chinese history from the time of legendary figure Emperor Huang to the Han Dynasty in 130 chapters.
C.
The earliest chronicle in China with concise and meticulous language
D.
the most ancient collection of Chinese prose writings with fragments of disconnected and diverse individual official papers.
【单选题】The Spring and Autumn Annals
A.
the most ancient collection of Chinese prose writings with fragments of disconnected and diverse individual official papers.
B.
The earliest chronicle in China with concise and meticulous language
C.
Another historical work recording the history of each of the states in the Pre-Qin times
D.
The first comprehensive historical account of the major political, social and military events of the Spring and Autumn period, setting the first widely imitated prose model
【单选题】They are meticulous in work, well aware a careless mistake will cost the company millions of pounds.
A.
rather casual
B.
pretty slow
C.
very careful
D.
really considerate
【单选题】Records of the Grand Historian
A.
the most ancient collection of Chinese prose writings with fragments of disconnected and diverse individual official papers.
B.
The earliest chronicle in China with concise and meticulous language
C.
A monumental work in the form of individual biography, recording Chinese history from the time of legendary figure Emperor Huang to the Han Dynasty in 130 chapters.
D.
The first comprehensive historical account of the major political, social and military events of the Spring and Autumn period, setting the first widely imitated prose model
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