还原生成的三价铬的量或未反应的重铬酸钾的量能被测出。

Either the amount of reduced chromium or the amount of unreacted dichromate can be measured.

youdao

还原生成的三价铬的量或未反应的重铬酸钾的量能被测出。

Either the amount of reduced chromium or the amount of unreacted dichromate can be measured.

youdao