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【单选题】
关于小砌块施工,错误的是().
A.
砌块应将底面砌筑,即砌块孔洞上大小“反砌”
B.
小砌块砌体的水平灰缝砂浆饱满度不得低于90%,竖向灰缝的砂浆饱满度不得低于80%
C.
小砌块砌体的砌筑方式只有全顺一种。
D.
常温条件下,普通混凝土小砌块施工前可洒水,但不宜过多
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【多选题】采用( BCD )做法,能增加标题与正文之间的段间距。
A.
增加标题的段前间距;
B.
增加第一段的段前间距:
C.
增加标题的段后间距;
D.
增加标题和第一段的段后间距。
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【单选题】弱酸水溶液中的氢离子浓度可表示为 ( )
A.
14 – pOH
B.
Kw/pOH
C.
10 pOH-14
D.
10 14-pOH
【单选题】弱酸性水溶液中的氢离子浓度可表示为( )
A.
14- pOH
B.
Kw /pOH
C.
1 0-(14-pOH)
D.
1 0-pOH
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【单选题】弱酸性水溶液中的氢离子浓度可表示为()
A.
14_pOH
B.
K θ w /pOH
C.
10 -pOH
D.
10 -(14-pOH)
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