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【单选题】
短周期元素 W 、 X 、 Y 、 Z 的原子序数依次增大,其中 Z 为金属且 Z 的原子序数为 W 的 2 倍。 n 、 p 、 q 是由这些元素组成的二元化合物,常温下, n 为气体。 m 、 r 、 s 分别是 Z 、 W 、 X 的单质, t 的水溶液呈碱性焰色反应呈黄色,上述物质间的转化关系如图所示。下列说法正确的是( )
A.
简单离子半径： Z ＞ Y ＞ X
B.
化合物 P 中只存在离子键
C.
图示转化关系涉及的反应均为氧化还原反应
D.
最简单气态氢化物的稳定性： W ＞ X
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【单选题】UNIT 3 PART 1 SECTION B TASK 3 Listen to the following passage. Choose the best answer to each question. (You are required to finish the question 6, question 7 and question 8 altogether.) 6. What hap...
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People work at a more interesting job.
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People are out of job.
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People have to go back to school to learn a new job.
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【单选题】2 Question 1 to 3 are based on the conversation you have just heard.
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【单选题】Passage 1 Question 16 to 18 are based on the passage you have just heard. question 16.mp3:
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Read at least several chapters at one sitting.
C.
Develop a habit of reading critically.
D.
Get key information by reading just once or twice.
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【单选题】3 Question 1 to 3 are based on the conversation you have just heard.
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【单选题】UNIT 1 PART 1 SECTION B TASK 3 Listen to the following passage. Choose the best answer to each question. (You are required to finish the question 6, question 7 and question 8 altogether.) What is the ...
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【多选题】瓷器的种类繁多,大致可分为
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【单选题】在ZigBee网络中存在三种设备类型：协调器、路由器和终端设备，但是在ZigBee网络中只能有一个（ ），可以有多个（ ）和多个（ ）。
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路由器、协调器、终端
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协调器、终端、路由器
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路由器、终端、协调器
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终端、路由器、协调器
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【简答题】ZigBee 网络中有三种类型的节点,分别是()、()和 ZigBee 终端节点。
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【单选题】Conversation 1 Question 9 to 11 are based ont the conversation you have just heard. question 9.mp3:
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She had a job interview to attend.
B.
She was busy finishing her project.
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She had to attend an important meeting.
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She was in the middle of writing an essay.
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【单选题】UNIT 3 PART 1 SECTION B TASK 3 Listen to the following passage. Choose the best answer to each question. (You are required to finish the question 6, question 7 and question 8 altogether.) 6. What hap...
A.
People work at a more interesting job.
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D.
People have to go back to school to learn a new job.
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【单选题】2 Question 1 to 3 are based on the conversation you have just heard.
A.
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Agriculture
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Industry
D.
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【单选题】Passage 1 Question 16 to 18 are based on the passage you have just heard. question 16.mp3:
A.
Ignore small details while reading.
B.
Read at least several chapters at one sitting.
C.
Develop a habit of reading critically.
D.
Get key information by reading just once or twice.
查看完整题目与答案
【单选题】3 Question 1 to 3 are based on the conversation you have just heard.
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Cars
C.
Factories
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【单选题】1 Question 1 to 3 are based on the conversation you have just heard.
A.
Mine
B.
Gold
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【单选题】UNIT 1 PART 1 SECTION B TASK 3 Listen to the following passage. Choose the best answer to each question. (You are required to finish the question 6, question 7 and question 8 altogether.) What is the ...
A.
To tell the story of fraud.
B.
To persuade people to change their minds about donating.
C.
To let people know how much they should donate.
D.
To tell people the weakest link in society.
查看完整题目与答案
【多选题】瓷器的种类繁多,大致可分为
A.
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B.
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C.
强化瓷
D.
骨瓷
查看完整题目与答案
【单选题】在ZigBee网络中存在三种设备类型：协调器、路由器和终端设备，但是在ZigBee网络中只能有一个（ ），可以有多个（ ）和多个（ ）。
A.
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【单选题】Conversation 1 Question 9 to 11 are based ont the conversation you have just heard. question 9.mp3:
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She had a job interview to attend.
B.
She was busy finishing her project.
C.
She had to attend an important meeting.
D.
She was in the middle of writing an essay.
查看完整题目与答案