问题描述：
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ears were first treated at room temperature with 1 M
HCl for 1.5 h, 5.8 M HCl for 2 h, followed by 1 h in 1 M HCl. Ears were
washed three times for 3 min in distilled H2O,.
ears were first treated at room temperature with 1 M
HCl for 1.5 h, 5.8 M HCl for 2 h, followed by 1 h in 1 M HCl. Ears were
washed three times for 3 min in distilled H2O,.
问题解答：
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