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【单选题】
xt0504437在原子吸收光谱分析中,要求标准溶液和试液的组成尽可能相似,且在整个分析过程中操作条件保持不变的分析方法是()。A.
内标法
B.
标准加入法
C.
化法
D.
标准曲线法
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反馈参考答案：
举一反三
【简答题】"Wereyou ever in a hospital when you were small? How did you feel?" The doctorsin Children's Hospital are asking for money for children's toys. Some childrenin the hospital must stay in bed for many w...
【单选题】"Yes, I am afraid I must," she said, and managed a smile.
A.
She succeeded in smiling.
B.
She controlled herself.
C.
She smiled when she didn't really want to.
D.
she smiled happily.
【简答题】If I were a boy again, I would practice perseverance more often, and never give up a thing because it was or inconvenient. If we want light, we must conquer darkness. Perseverance can sometimes equal ...
【简答题】"New York City is not America. " That’s what American friends are sure to you when you arrive. "You must see Boston, visit Niagara Falls, go to Virginia, fly down to Florida, and so on; but first, of ...
【单选题】The following argument uses what type of appeal, "I want you to look at the defendant and feel the horrible pain his victims must have felt as he robbed them of their innocence. The emotion is too gre...
A.
fructose
B.
ethos
C.
pathos
D.
logos
【判断题】"Must", "want" and "give" make it clear that what we should stick to, giving up and striving for, and thus we will have a clearer picture how to "play cards" during the negotiation.
A.
正确
B.
错误
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