单选题假设s的值是“浙江电视台中国好声音”，如下函数结果返回“中国好声音”的是（ ）。Aleft(s，5)Bleft(s，10)Cright(s，5)Dright(s，10)
单选题
假设s的值是“浙江电视台中国好声音”，如下函数结果返回“中国好声音”的是（ ）。
A
left(s，5)
B
left(s，10)
C
right(s，5)
D
right(s，10)
参考解析
解析：
LEFT(<字符表达式>，<长度>)从指定表达式值的左端取一个指定长度的子串作为函数值， RIGHT(<字符表达式>，<长度>)从指定表达式值的右端取一个指定长度的子串作为函数值。每个中文字符长度为2，本题中，从右取长度为10的子串为“中国好声音”。
LEFT(<字符表达式>，<长度>)从指定表达式值的左端取一个指定长度的子串作为函数值， RIGHT(<字符表达式>，<长度>)从指定表达式值的右端取一个指定长度的子串作为函数值。每个中文字符长度为2，本题中，从右取长度为10的子串为“中国好声音”。
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