【单选题】名肴“东江盐焗鸡”“大良炒鲜奶”是 _________ 的代表品种。
【简答题】已知甲基橙 p K (HIn) = 3.4, 当溶液 pH = 3.1 时 [In - ]/[HIn] 的比值为 ____________; 溶液 pH = 4.4 时 [In - ]/[HIn] 的比值为 _________; 依通常计算指示剂变色范围应为 pH = p K (HIn) ± 1, 但甲基橙变色范围与此不符 , 这是由于 _________________________ 。
【单选题】听力原文:China has realized the great importance of healthcare, and this has been shown in the government documents...They are ready to look at public-private partnerships in the health area, realizing th...
【单选题】It ________ some time _________ I realized the truth.
【简答题】已知甲基橙 p K (HIn) = 3.4 ,当溶液 pH = 3.1 时 [In - ]/[HIn] 的比值为 ____________ ;溶液 pH = 4.4 时 [In - ]/[HIn] 的比值为 _________。
【单选题】名肴“东江盐焗鸡”、 “大良炒鲜奶”是( )的代表品种。
【判断题】已知甲基橙 p K (HIn) = 3.4, 当溶液 pH = 3.1 时 [In - ]/[HIn] 的比值为 0.5 。