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【单选题】
若检查葡萄糖中砷盐时,取葡萄糖4.0g溶解后以规定方法检查,所用标准砷溶液的浓度为2μg/ml,砷盐限量规定为0.0001%检查时应取标准砷溶液的量为( )
A.
2.0ml
B.
2.5ml
C.
0.02ml
D.
1ml
E.
0.01ml
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参考答案:
举一反三
【单选题】在水准测量中,转点所起的作用是( )。
A.
传递高差
B.
传递距离
C.
传递距离
D.
以上都不对
【判断题】China’s aircraft manufacturing industry is developing fast because more and more Chinese have the money to fly.
A.
正确
B.
错误
【简答题】When he returned to Japan, he took with him a handful of tango records and an excellent understanding of the Paris tango. →In the 20th century, the tango reached Japan. On Baron Megata's_________ , he...
【单选题】在水准测量中,转点所起的作用是( )。
A.
传递高程和传递高差
B.
传递高程
C.
传递距离
D.
传递高差
【单选题】China’s movie industry is developing at a fast pace and has a promising future. Now listen to a news report and choose the best answer to each of the questions you hear.
A.
America’s domestic box office rose last year.
B.
China’s domestic movie ticket sales declined last year.
C.
China is expected to surpass the US in the global movie market.
D.
China is narrowing the gap with the US in the global movie market.
【简答题】Robert Spring , a 19th century forger, was so good at his profession that he was able to make his living for 15 years by selling false signatures of famous Americans. Spring was born in England in 181...
【单选题】China’s movie industry is developing at a fast pace and has a promising future. Now listen to a news report and choose the best answer to each of the questions you hear.
A.
11 billion yuan .
B.
13.5 billion yuan .
C.
54 billion yuan .
D.
55.9 billion yuan .
【单选题】在水准测量中,转点所起的作用是( )。
A.
传递距离
B.
传递高差
C.
计算高程
D.
放置仪器
【单选题】China’s movie industry is developing at a fast pace and has a promising future. Now listen to a news report and choose the best answer to each of the questions you hear.
A.
India.
B.
China.
C.
The UK.
D.
The US.
【简答题】Passage 1 Robert Spring, a 19th century forger (伪造者), did well in his job that he was able to make his living for 15 years by selling false signatures of famous Americans. Spring was born in England i...
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