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【单选题】
原子吸收分析中的吸光物质是 ( )A.
分子
B.
离子
C.
原子
D.
基态原子
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举一反三
【单选题】From the second paragraph we learn that ______.
A.
the workforce classification is as serious as the reason of education system
B.
twenty-first-century work are separated from the needs of the business world
C.
white-collar worker is only part of the problem of education system
D.
blue-collar manual laborers are needed in agrarian-aged America
【简答题】简述三相异步电动机连续运行的控制过程分析?
【单选题】According to the author, we should follow the standard of decorum of ______.
A.
to be serious and persevering.
B.
to be frivolous and careless.
C.
to be vigilant and hesitating.
D.
to be brave and indulgent.
【单选题】FDA considers it the producers' duty to warn the users of sleeping pills about the serious side effects and to tell them how to use safely.
A.
Right
B.
Wrong
C.
Not mentioned
【简答题】The New Madrid fault is______. A) a horizontal fault B) a vertical fault C) a more serious fault than the San Andreas fault D) responsible for forming the Mississippi River
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