安装水泵吸水管时,从吸水面到泵应具有不小于0.005向上坡度。()
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Which action will affect the trim of a vessel ().
A. Moving high weights lower
B. Adding weight at the tipping center
C. Moving a weight forward
D. All of the above
新生儿窒息时，胸外按压的频率为
A. 30次／分
B. 60次／分
C. 90次／分
D. 100次／分
E. 120次／分
Which of the following can be regarded as the best title for this article？
A. Two Basic Rights.
B. Government Is Not Enough to Encourage Economy.
C. Individual Rights Are Crucial.
D. Comments by Mancur Olson.
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