凡是与可燃物结合能导致和支持燃烧的物质，称为（）。
A.可燃物
B.易燃物
C.助燃物
D.燃烧产物
参考答案：C
Lily succeeded,for she had made a great________andgot over plenty of difficulties. [ ]
A. force
B. strength
C. effort
D. energy
选粉机工岗位责任制？
