A、strength
B、dense
C、percentage
D、velocity
更多“Acid solution（） in the system can be tested from time to time by putting some on to a piece of lime.”相关的问题
A、rub the eyes B、irritate the eyes C、wash the eyes with a heavy boric acid solution D、obtain medical help
A、It causes excessive smoking and soot at low firing rates B、It doesn’t readily burn when combined with oxygen C、It clogs fuel oil strainers more often D、It forms a corrosive acid when mixed with water or water vapor
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