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单项选择题vara=["w","e","b","前","端","开","发"];varb=a.splice(3,4);document.write(a.join(""));document.write(b.join(""));输出结果是()。

A、web前.端开发

B、we.b前端开发

C、web前端开发

D、前端开发web

  • C
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