在法扬斯法中，为了使沉淀具有较强的吸附能力，通常加入适量的糊精或淀粉使沉淀处于胶体状态。( )
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Passage OneQuestions 26 to 28 are based on the passage you have just heard.
A. The lack of a real form of government structure.
B. The creativeness of Eskimos.
C. The excitement of a legal system with strict laws.
D. The strong judicial powers of a headman.
福尔哈德法以NH4CNS为标准滴定溶液，铁铵矾为指示剂，在稀硝酸溶液中进行滴定。( )
A. 对
B. 错
Passage OneQuestions 26 to 28 are based on the passage you have just heard.
A. Because a headman had no legal authority.
Because people didn’t own land.
C. Because there were no strict laws against homicide.
D. Because there were limited resources.
Unemployed, John__________________(几乎无法维持生计).
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