()是指煤在规定条件下完全燃烧后剩下的固体残渣。
参考答案:灰分
小气道由终末细支气管到呼吸性细支气管大约14~19级支气管分支所组成,此类细支气管小于()
A.2mm
B.5mm
C.3mm
D.4mm
E.8mm
Justices of the peace have jurisdiction over the trials of some civil suits and of criminal cases involving minor offenses.
A.supremacy
B.authority
C.guidance
D.obedience