设a=“Microsoft Visual Basic”, 则以下使变量b的值为”Visual Basic”的语句是 . A. b=Left(a,10) B.设a=“Microsoft Visual Basic”, 则以下使变量b的值为”Visual Basic”的语句是 .A. b=Left(a,10) B. b=Mid(a,10)
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![设a=“Microsoft Visual Basic”, 则以下使变量b的值为”Visual Basic”的语句是 . A. b=Left(a,10) B.设a=“Microsoft Visual Basic”, 则以下使变量b的值为”Visual Basic”的语句是 .A. b=Left(a,10) B. b=Mid(a,10)](/uploads/image/z/3745021-13-1.jpg?t=%E8%AE%BEa%3D%E2%80%9CMicrosoft+Visual+Basic%E2%80%9D%2C+%E5%88%99%E4%BB%A5%E4%B8%8B%E4%BD%BF%E5%8F%98%E9%87%8Fb%E7%9A%84%E5%80%BC%E4%B8%BA%E2%80%9DVisual+Basic%E2%80%9D%E7%9A%84%E8%AF%AD%E5%8F%A5%E6%98%AF+.+A.+b%3DLeft%28a%2C10%29+++B.%E8%AE%BEa%3D%E2%80%9CMicrosoft+Visual+Basic%E2%80%9D%2C+%E5%88%99%E4%BB%A5%E4%B8%8B%E4%BD%BF%E5%8F%98%E9%87%8Fb%E7%9A%84%E5%80%BC%E4%B8%BA%E2%80%9DVisual+Basic%E2%80%9D%E7%9A%84%E8%AF%AD%E5%8F%A5%E6%98%AF++++.A.+b%3DLeft%28a%2C10%29++++B.+b%3DMid%28a%2C10%29)
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设a=“Microsoft Visual Basic”, 则以下使变量b的值为”Visual Basic”的语句是 . A. b=Left(a,10) B.设a=“Microsoft Visual Basic”, 则以下使变量b的值为”Visual Basic”的语句是 .A. b=Left(a,10) B. b=Mid(a,10)
设a=“Microsoft Visual Basic”, 则以下使变量b的值为”Visual Basic”的语句是 . A. b=Left(a,10) B.
设a=“Microsoft Visual Basic”, 则以下使变量b的值为”Visual Basic”的语句是 .
A. b=Left(a,10) B. b=Mid(a,10)
C. b=Right(a,10) D. b=Mid(a,11,10)
此题选B,谁能告诉为什么,王分感激!
设a=“Microsoft Visual Basic”, 则以下使变量b的值为”Visual Basic”的语句是 . A. b=Left(a,10) B.设a=“Microsoft Visual Basic”, 则以下使变量b的值为”Visual Basic”的语句是 .A. b=Left(a,10) B. b=Mid(a,10)
因为b=mid(a,10)省略了提取字符的个数,默认是指从变量a字符串的第10位开始提取字符串到该字符串的结束,所以结果是“visual basic”