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【判断题】
原子发射光谱定性分析时,摄谱仪狭缝宜窄,目的是保证有一定的分辨率,减少谱线间的干扰。A.
正确
B.
错误
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举一反三
【判断题】(Four Choices for Young People) To deal with such problems, the young should draw on the experiences of the old rather than reject them altogether. ()
A.
正确
B.
错误
【简答题】Young people should be______(respect)of their elders.
【简答题】表达式“3.5+1/2+56%10”的计算结果是_____。
【单选题】Which of the following statements is NOT true, according to the passage?
A.
s should take more calcium till they grow up to 30.
B.
Less participation in sports presupposes less intake of calory.
C.
Women should take less and less vitamin D when growing old.
D.
Women should take more and more vitamin D when growing old.
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