— This sweater is too small. Would you mind giving me a bigger one? 

—  _____. Here you are. [ ]

A. I disagree

B. Good idea

C. Thanks a lot

D. Not at all

压力容器工作特性中，生产过程所涉及的介质品种繁多，分类方法也有多种，按化学特性分类，则有（）等几种．

A．闪燃

B．可燃

C．易燃

D．爆燃

E．助燃