CSS设置文本禁止被选中代码：

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-webkit-touch-callout: none; /* iOS Safari */

-webkit-user-select: none; /* Chrome/Safari/Opera */

-khtml-user-select: none; /* Konqueror */

-moz-user-select: none; /* Firefox */

-ms-user-select: none; /* Internet Explorer/Edge */

user-select: none; /* Non-prefixed version, currently not supported by any browser */