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[单选题]
酸碱灭火器的硫酸瓶中所装硫酸的浓度为()。
A.30%—35%
B.40%—45%
C.50%—55%
D.60%—65%
查看答案
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A.30%—35%
B.40%—45%
C.50%—55%
D.60%—65%
A.75%,60%
B.68%,63%
C.71%,73%
D.59%,65%
A. 43700000
B. 87400000
C. 87455000
D. 43755000
A.75%.60%
B.68%,63%
C.71%,73%
D.59%,65%
A. 118
B. 120
C. 112
D. 124
耐酸酚醛塑料管是一种具有良好耐腐蚀性和热稳定性的非金属管材,但不能用其输送的介质为()。
A.碱
B.盐酸
C.低浓度硫酸
D.中等浓度硫酸