在电解槽的生命周期里，钠对阴极的侵蚀速度是（）
A、均匀的
B、先快后慢
C、先慢后快
参考答案：B
The film The Flowers of War, which ______ last December, is about saving a group of Chinese students in the 1930s.
A．worked out
B．came out
C．turned out
D．broke out
蛙泳的减阻为什么比其他泳式更为重要？
