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【判断题】
负责标定国家药品标准物质的机构是中国食品药品检定研究院。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】听力原文： Interview is extremely important if you want to apply for a job. To be successful in a job interview, you should demonstrate certain personal and professional qualities to your potential bosses....
A.
Less than 40 minutes.
B.
From 40 to 70 minutes.
C.
At least 40 minutes.
D.
More than 70 minutes.
【单选题】Ice skates manufactured entirely of iron were first sold in the 1800's.
A.
mainly
B.
successfully
C.
solely
D.
routinely
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