下列物质中，与水作用不发生化学自热着火的是( )。
A．氢化钠
B．黄磷
C．钠
D．钾
参考答案：B
The factory near the seaside was closed down as a(n) ________ of the terribly bad management and fund shortage.
A．summary
B．consequence
C．conclusion
D．effect
随变质程度的加深，煤的挥发分逐渐降低。
