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【单选题】
下列有关物质的性质、用途的叙述，不正确的是（ ）A.
可有锁孔中加入少量铅笔芯粉做润滑剂
B.
氧气可供给呼吸和做液氧炸药
C.
活性炭可作防毒面具的滤毒剂
D.
因为氢气具有可燃性，所以可以用氢气治炼金属
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举一反三
【单选题】What is the main idea of the passage?
A.
The delicacy of the Chinese restaurant in Singapore.
B.
The advantages and disadvantages of living in a cosmopolitan city.
C.
The danger and threat of population explosion in urban areas.
D.
The high living standard of Singapore, London, Paris and New York.
【多选题】降血脂药按照结构类型和作用机制可以分为: ( ) A. 烟酸类及其衍生物 B. HMG-CoA 还原酶抑制剂 C. 硝酸酯 D. 芳氧烷酸类 E. 二氢吡啶类
A.
A
B.
B
C.
C
D.
D
E.
E
【单选题】An American company operates a fast food restaurant in Paris, France. Which of the following statements is accurate?
A.
The value of the goods and services produced by the restaurant is included in both French GDP and U.S. GDP
B.
The value added by American workers and equipment in France is included in U.S. GDP and the value added by French workers and equipment is added to French GDP
C.
The value of the goods and services produced by the restaurant is included in French GDP, but not in U.S. GDP.
D.
The value of the goods and services produced by the restaurant is included in U.S. GDP, but not in French GDP.
【简答题】导热过程的第一类边界条件是 ,导热过程的边界条件中若某一个边界面是绝热的,则这属于第 类边界条件。
【判断题】The following is an example of specific purpose statements for speech about processes: The lowest section of the tower contains the entrance, a gift shop, and a restaurant. The middle section of the t...
A.
正确
B.
错误
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