用软薄、件大原料将主料折叠包裹的原料造型方法称为( )。
参考答案:包
. Mary was only too ready to help others, seldom, _____, refusing them when they turned to her.
A.if never
B.if not
C.if any
D.if ever
捣固焦炉属于()。
A、倒装焦炉
B、顶装焦炉
C、单热焦炉