一瓶装25kg液化二氧化碳，若焊接时的流量为20L/min，则可连续使用（）。
A、8h左右
B、10h左右
C、12h左右
参考答案：B
It turned out that he had forgotten to ______ the lens cap and all the pictures he had taken thus failed to develop.
A．remove
B．delete
C．erase
D．detach
The park was named Bing Hong Park ____________ a famous painter Huang Binghong．
A．in celebration of
B．in place of
C．in hope of
D．in memory of
