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用0.2 mol/L NaOH溶液滴定0.2 mol/L HCl和0.2 mol/L柠檬酸(H3A)的混合液(H3A的Ka1= 7.4×10-4, Ka2= 1.7×10-5, Ka3= 4.0×10-7), 如果允许滴定误差为0.2%,则终点时溶液组成应为------------()
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(中国石油大学(北京)2006年硕士研究生入学考试试题)NaOH标准溶液因保存不当吸收了CO2,若以此NaOH标准溶液滴定H3PO4至第二个化学计量点，则HPO4-的分析结果()。
用0.1000 mol/L NaOH滴定25.00 mL 0.1000 mol/L HCl,若以甲基橙为指示剂滴定至pH = 4.0为终点,其终点误差TE= ____%。
Complete the summary of "You Are Less Beautiful than You Think" with the following word bank. Read the passage through carefully before making your choices. Each choice in the bank is identified by a letter. You may not use any of the words in the bank more than once.(只需要选择序号即可)A.original B.socializeC.entitledD.premise E.more computerizedF.describeG.achievedH.identify I.unmodified picture J.depictA video 1.“Dove Real Beauty Sketches”2.instant popularity and prompted debate. In the video, a small group of women are asked to3.their faces to a forensic artist. Before all this, each woman is asked to 4.with a stranger, who later separately describes the woman to the forensic artist. In the end, there are two drawings, one based on their own description, the other based on the stranger’s description. To their surprise, the drawings based on strangers’descriptions 5.much more beautiful women. Does it mean you are more beautiful than you think?The psychological research suggests that when people are asked to 6.themselves among the 7.images, more computerized images and less computerized images, they tended to select 8.one which is more attractive. however, when people are asked to identify a stranger among these three image, they tended to select the 9.picture. People see themselves as better looking than they actually are, which is the result of a general phenomenon psychologists call “self-enhancement. ”Due to it, people can boost confidence. Dove’s 10.is wrong. But thinking we are more beautiful than we really are may not be such a bad thing.
在世代间连续传递且无性别分布差异的遗传病为
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