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网友回答（3条）
防止滴定时的误差
不润洗&&标准液会被稀释&&会使结果变大
那其他仪器为什么不需要呢
烧杯不需要&&因为滴定是我们默认杂质不与滴定也反应
其他的也不会影响结果
不是只有滴定管，量筒等需要度量液体的都要提前润洗
&&&&，V2.32668(meiyuyiqi)
(副刊游侠)
(七月初五)
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nginx error!
The page you are looking for is temporarily unavailable.
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Website Administrator
Something has triggered an error on your
This is the default error page for
nginx that is distributed with
It is located
/usr/share/nginx/html/50x.html
You should customize this error page for your own
site or edit the error_page directive in
the nginx configuration file
/etc/nginx/nginx.conf.}