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【单选题】
下列关于氢化物发生法的说法中,错误的是
A.
氢化物发生法是指在一定条件下,用还原剂将待测成分还原成挥发性共价氢化物,从基体中直接分离,再对待测物进行检测的前处理方法
B.
常用的还原体系包括:金属-酸还原体系、硼氢化钠(钾)-酸还原体系
C.
该法常用于Ca、Mg、Fe、Zn等元素的测定
D.
氢化物发生法常常与原子荧光光谱仪联用
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举一反三
【多选题】历代为《孟子》作注,重要的有()
A.
赵岐的《孟子注》
B.
朱熹的《孟子集注》
C.
焦循《孟子正义》
D.
杨伯峻《孟子译注》
E.
王云五《孟子今注今译》
【单选题】下面不是恩格斯代表著作的是()。
A.
《自然辩证法》
B.
《反杜林论》
C.
《路德维希·费尔巴哈和德国古典哲学的终结》
D.
《哥达纲领批判》
【单选题】Section B Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You shoul...
A.
Americans are too attached to their cars
B.
public transportation in America is welldeveloped
C.
American cars are too fast
D.
automobiles ener health
【单选题】1) Why do different types of libraries exist according to the passage?
A.
To offer different services to different people.
B.
To serve all members of the general public.
C.
To satisfy different needs of all potential users.
D.
To attract more users to use their resources.
【单选题】Car thefts go smoothly because______.
A.
the police have got involved in them
B.
the stolen cars sell well in the world market
C.
the thieves are familiar with the parking garages
D.
they are promoted by some international cooperation
【简答题】Why do people have different ways of learning?
【简答题】Passage Two For more than 10 years there has been a bigger rise in car crime than in most other types of crime.An average of mote than two cars a minute are broken into,vandalized(破坏)or stolen in the ...
【单选题】1 Why do people express similar ideas in different ways?
A.
They want to show off.
B.
They are in different situations.
C.
They know different languages.
D.
They want to be polite.
【单选题】Why do people express similar ideas in different ways?
A.
They want to show off.
B.
They are in different situations.
C.
They know different languages.
D.
They want to be polite.
【简答题】(2019·广东三模)阅读材料,完成下列要求。 材料一 “民本”二字出自《尚书·五子之歌》:“民惟邦本,本固邦宁”。孔子主张“因民之所利而利之”;孟子认为“民贵君轻”;《荀子》中说:“君者,舟也;庶人者,水也。水则载舟,水则覆舟。”作为中国传统文化中源远流长的珍贵历史遗产,民本思想的内涵随着历史的发展不断丰富并有所衍变。在近代中国,它被注入了新的理论内容,成为推动社会进步的重要思想武器。康有为在给...
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