Litmus test on a lemon. A piece of red litmus paper held against a freshly-cut face of lemon. The lack of change of colour means that the lemon must be either acidic or neutral. Lemons, like all citrus fruits, contain citric acid.
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Details
Creative#:
TOP15088498
Source:
達志影像
Authorization Type:
RM
Release Information:
須由TPG 完整授權
Model Release:
No
Property Release:
No
Right to Privacy:
No
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