下列锅炉防腐法中,属于干式防腐的是()法。
A.压力防腐
B.联胺防腐
C.充氧
D.碱液防腐
参考答案:C
Peter has many friends;_________can help him.
A.few of which
B.few of whom
C.few of that
D.few of them
公文()结构之一主题词。