题目

（14分）某课外兴趣小组欲测定某NaOH溶液的浓度，其操作步骤如下：① 将碱式滴定管用蒸馏水洗净后，用待测溶液润洗后，再注入待测溶液，调节滴定管的尖嘴部分充满溶液，并使液面处于0刻度以下的位置，记下读数；将锥形瓶用蒸馏水洗净后，用待测溶液润洗锥形瓶2～3次；从碱式滴定管中放入25.00mL待测溶液到锥形瓶中；② 将酸式滴定管用蒸馏水洗净后，立即向其中注入0.1000mol/L标准盐酸，调节滴定管的尖嘴部分充满溶液，并使液面处于0刻度以下根据短文内容，从下框的A – F选项中选出能概括每一段主题的最佳选项。选项中有一项为多余项。A．Limit the number of new names you learn at one time.B．Arriving early helps to remember more names.C．Use imagination to know other’s names．D．Acknowledge（承认）you don’t know other’s names.E．Read one’s name to yourself over again.F．Remember the names with someone’s help．   Remembering names is an important social skill．Here are some ways to master it.【小题1】When you hear a person’s name and want to remember it, repeat it．Immediately say it to yourself several times without moving your lips．You could also say the name again in a way that does not sound forced or artificial.【小题2】You can let other people help you remember their names．After you’ve been introduced to someone, ask that person to spell the name and pronounce it correctly for you．Most people will be pleased by the effort you’re making to learn their names.【小题3】Admitting that you can’t remember someone’s name can actually make people relaxed．Most of them will feel sympathy if you say “I’m working to remember names better．Yours is right on the tip of my tongue．What is it again?”【小题4】    When meeting a group of people, concentrate on remembering just two or three names．Free yourself from remembering every one．Few of the people in mass introductions expect you to remember their names．Another way is to limit yourself to learning just first names．Last names can come later.【小题5】    Consider going early to conferences, parties and classes．Sometimes just a few people show up on time．There are fewer names for you to remember．And as more people arrive, you can hear them being introduced to others — an automatic review for you.