单项选择题
去离子水本身不具备粘结作用，用来触发粉末之间的粘结反应。
A、正确
B、错误
去离子水本身不具备粘结作用，用来触发粉末之间的粘结反应。
A、正确
B、错误
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是以
为周期的奇函数, 或是定义在
上的奇函数,
越小，反应速率越大。（ ）单项选择题
Even though people all use the Chinese language, they speak in different ways in different areas, which are called ____
Even though people all use the Chinese language, they speak in different ways in different areas, which are called ____
A．Idiom
B．Dialects
C．Proverbs
D．Poetry