题目内容：
以下描述错误的是（）A.电子级高纯多晶硅达到9~10个“9”
B.金属硅通过化学提纯得到高纯硅
C.西门子法中三氯氢硅的提纯可以采用精馏提纯的方法
D.西门子法的优点是产量大、质量高，但是成本高
参考答案：
选择题：以下描述错误的是（）A.电子级高纯多晶硅达到9~10个“9”
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