钛及钛合金氩弧焊焊接时温度高于（）℃的区域，若不保护就会严重氧化。
A.200
B.300
C.400
D.500
参考答案：C
_____ girls took part in the Super Girl Competition, but only few of them succeeded. [ ]
A.One million of
B.Millions of
C.Two millions
D.Million of
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