At formal American dinner，the knives，forks，and spoons besides the plate are placed
A. Right
B. Wrong
C. Not mentioned
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The salt concentration in the liquid water of Lake Vida__________．
A. is found to be a great deal higher than that of seawater
B. was of little scientific value
C. may be older than that collected below 39 sheet of ice
D. might have come from Mars
E. is to collect some briny lake water for analysis
F. may return to life sooner than microbes frozen in the surface ice．
在学校的日常课堂教学中开展对某教学方法的实验研究，这种研究方法主要属于（）
按照《公路工程技术标准》(JTG B01--2003)的分类标准，中桥指多孑L跨径总长￡为（）。
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