Why does the writer say most American TV commercials succeed in achieving their main aim
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The Oscars Awards usually have a ______ system which means to keep the results until the last moment.
Why does the writer use "reveled in" in paragraph 3 to describe the viewers watching a TV commercial
下列腹水常规检验，哪项结果不符合结核性腹膜炎改变
A. 白细胞0.2×109/L，以中性粒细胞为主
B. 一般细菌培养阴性，浓缩找结核杆菌阳性
C. 李凡他试验阳性
D. 比重＞1.018
E. 草黄色
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