问题 选择题

下列实验的实验现象与实验结论都正确的是[ ]

 
实验操作
实验现象
实验结论
A
将一根未打磨的铝条放入硫酸铜溶液中
无紫红色固体析出
铝不如铜活泼
B
将带火星的木条伸入氧气中
木条复燃
氧气支持燃烧
C
将CO通入灼热的氧化铜
黑色的氧化铜变成红色
CO具有可燃性
D
将氢氧化钠固体加入水中
溶液温度升高
该反应放热
答案

答案:B

完形填空

小题1:As Polly _______ the passengers on the train, she had a feeling that she was being watched by a tall man in a dark overcoat. At last the train arrived at Green Park station.

小题2:When Polly got to the station entrance, it was empty. Outside, _______ she looked the fog _______ like a thick, grey cloud. … The man moved away. She could feel her heart _______ with fear.

小题3:“Here we are. King Street.” He stopped.

“Thank you so much for coming to my _______,” said Polly in _______. “Would you like to come in and rest for a _______?”

小题4:Before the middle of the 5th century, people in Britain all spoke a language called Celtic. Then two Germanic groups from the European _______—the Angles and the Saxons—_______ Britain. … Both the English language and the English people are _______ after the Angles; the word Angle was _______ Engle in Old English.

小题5:Modern English appeared during the Renaissance in the 16th century. Because of this, Modern English includes many Latin and Greek words. _______ also went _______ huge changes during this period. Of course, this was not the end of the changes in the English language.

小题6:People started to dig in the area for treasure, which caused much damage. Thus, in 1860, the area was put under _______ protection so it could be _______ and studied.

小题7:I saw several houses which were _______ with wall paintings. I also saw the people who had been _______ alive.

小题8:A _______ from the local _______ institute, Professor Zhang, told us that around the year 1900 the European explorer Sven Hedin discovered the _______ of the Loulan Kingdom.

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