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【简答题】
用 正交安排实验,如果A因素对应各水平的均值分别为22,11,18,则A因素的极差R为( )。
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举一反三
【单选题】How is a point-by-point style argumentative essay different from a block style argumentative essay regarding how they disprove opposing points of view?
A.
Whereas only one paragraph in a point-by-point style argumentative essay will present a strong argument against an opposing view, all three paragraphs in a block style argumentative essay seek to disprove opposing points of view.
B.
Whereas all three paragraphs in a block style argumentative essay seek to disprove opposing points of view, only one paragraph in an argumentative point-by-point style essay will present a strong argument against an opposing view.
C.
Whereas all three paragraphs in a point-by-point style argumentative essay seek to disprove opposing points of view, in a block style argumentative essay there are no strong arguments against an opposing view.
D.
Whereas only one paragraph in a block style argumentative essay will present a strong argument against an opposing view, all three paragraphs in a point-by-point style argumentative essay seek to disprove opposing points of view.
【单选题】（ ）是中国化工实业家，中国重化学工业的奠基人，1937 年生产出中国第一批硫酸铵产品。1943 年研究开发成功了联合制碱新工艺。被称作“中国民族化学工业之父”
A.
吴蕴初
B.
范旭东
C.
侯德榜
D.
李远哲
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