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- Alt（计算机按键）_百度百科
Alt键是在Windows操作系统上的一个按键。 Alt键按照最新的ISO IEC 9995标准全称为Alternate，汉语意思为改变、交换，在计算机领域被称为交替换挡键。
- Alt key - Wikipedia
In Microsoft Windows, holding down the Alt key while typing in numbers (often referred to as Alt codes) on the numeric keypad allows the user to type special characters not normally available on the keyboard
- Alt键 - 搜狗百科
Alt键（Alternate）又名交替换档键、更改键、替换键。 Alt键通常与其他键组合发挥作用，单独是没有作用的。 在计算机键盘中，Alt键在键盘上左右各一个。 在美国制造的键盘中，左右键使用相同。
- Alt键的功能作用大全 - 知乎
Alt键是什么意思? Alt是Alternative的英文缩写，翻译中文为交换或者替换的意思，我们一般称Alt键为更改键或者替换件单独按alt键没有任何功能，一般都是用于与其他按键组合来使用，从而实现一些快捷功能。
- What Is Alt? - Computer Hope
Alt keyboard shortcuts and what the Alt key can do? Alt is used in a key combination to perform specific actions, such as accessing options in the file menu or the Ribbon
- Normal AST Levels by Age: Are You at Risk of Fatty Liver Disease?
Two such acronyms you may be less familiar with are AST (aspartate aminotransferase) and ALT (alanine transaminase)—liver enzymes measured through blood tests But why are they important? Is there such a thing as normal AST and ALT levels by age? And what are their implications for fatty liver disease?
- ALT 和 AST，到底是什么？ - 知乎
在肝功能检查单上，ALT 和 AST 这两个指标常常备受关注，它们就像肝脏健康的 “预警器”，默默隐藏着肝脏的秘密。 ALT，中文名 谷丙转氨酶，主要存在于肝细胞的细胞质中。
- Alanine aminotransferase (ALT) blood test - Mayo Clinic
An ALT blood test helps check for liver damage Learn when the test is done, how to prepare and what the results mean
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