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【单选题】
管道穿过墙壁和楼板,应设置金属或塑料套管。安装在楼板内的套管, 其顶部应高出装饰地面( )mm;安装在卫生间及厨房内的套管,其顶部应高出装饰地面()mm。A.
20；20
B.
50；50
C.
20；50
D.
50
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举一反三
【简答题】Besides
saying “no” directly, there are other ways of expressing “no” across cultures. Which of
the following is not true? (2.0分)A. Being
silent or showing a sign of enthusiasm. B. Offering
an alterna...
【简答题】STC89C51RC 单片机有 个中断源,可分为 个优先级。
【单选题】Besides saying “no” directly, there are other ways of expressing “no” across cultures. Which of the following is not true?
A.
Being silent or showing a sign of enthusiasm.
B.
Offering an alternative.
C.
Diverting and distracting.
【单选题】Besides saying “ no ” directly, there are other ways of expressing “ no ” across cultures. Which of the following is not true?
A.
Being silent or showing a sign of enthusiasm.
B.
Offering an alternative.
C.
Diverting and distracting.
D.
Avoidance.
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