感蓝胶片的吸收光谱的峰值在 （）
A.220nm
B.320nm
C.520nm
D.420nm
E.620nm
参考答案：D
The chance should be made __________, since you have got it.
A．up of
B．the most of
C．best of
D．a good use of
煤的气化指标包括哪些项目？
