如何进行滴定操作?

题型:问答题 简答题

问题:

如何进行滴定操作?

考点:执业西药师药物分析药物分析题库
题型:问答题 简答题
定义在R上的函数f(x)既是偶函数又是周期函数,若f(x)的最小正周期是π,且当x∈[0,
π
2
]时,f(x)=sinx,则f(
3
)的值为 ______.
题型:问答题 简答题

小明发现,张老师上课时观察远处的同学时要摘下眼镜,而看近处的课本时,又要戴上眼镜。这样频繁地戴上摘下眼镜非常不方便。张老师的眼镜属于     (选填“近视眼”或“远视眼”)。如下图所示的是一种新型眼镜,这种眼镜的镜片分上下两个区,A区厚薄均匀,B区可以矫正视力。张老师戴上这种眼镜就可以通过       看远处同学(填“A区”或“B区”),再不需要频繁地戴上摘下眼镜了。

题型:问答题 简答题
When I was growing up, I always gave my mom an apron (围裙)on her birthday.I wanted my own mom —   21  that apron I'd just given her, of course —to   22  me at the end of each afternoon bearing a plate of home-baked   23  as she waited breathlessly to hear about my   24  day at school.
Mom loved her family without question, but as an elementary-school teacher she had her own exciting days to   25   .She had hardly any extra time and   26 , and home-baked treats were rare in our house except   27  very special occasions.Since Mom didn't make cookies very often, the   28  of her baking were not always the same.Sometimes the cookies were browned a little more than planned or   29  together and other times the cookies weren't smooth.  30 , none of that bothered anyone in the family.All we   31  was swallowing whatever we were having for dinner that night so we could get to the cookies   32  us on the kitchen counter.
Now that I'm a mom myself, I can   33  all too well why my mother didn't always have the time to wear the apron.As was true with my mother, the list of things I need to do is often   34 than the day itself.But I also understand the desire to   35  the same yellow mixing bowl my mother used and make something special for my family every so often.Whatever I bake is met with approval, appreciation and good   36  by my husband and children.At some level, I believe they're   37  that I was thinking about them as I   38  the brown sugar into the butter or frosted the cake with their favorite kind of icing.They always know I love them.I  39  they know it a little better when I'm in a baking mood.
I'm sure my mother felt   40  the same way whenever she made cookies for us.Those cookies will always, in my mind, be the best treat.
小题1:
A.wearingB.holdingC.takingD.throwing
小题2:
A.watchB.greetC.guideD.encourage
小题3:
A.vitaminsB.vegetablesC.cookiesD.fruits
小题4:
A.boring B.frighteningC.comfortableD.exciting
小题5:
A.start withB.set upC.make upD.deal with
小题6:
A.powerB.workC.energyD.strength
小题7:
A.on B.atC.inD.by
小题8:
A.methodsB.resultsC.effortsD.ways
小题9:
A.putB.piledC.stuckD.tied
小题10:
A.BesidesB.HoweverC.MeanwhileD.Thus
小题11:
A.gave upB.cared aboutC.figured outD.cut down
小题12:
A.waiting forB.looking forC.longing forD.heading for
小题13:
A.predictB.admitC.commentD.understand
小题14:
A.longerB.heavierC.higherD.tighter
小题15:
A.put awayB.take onC.get outD.come about
小题16:
A.appetitesB.motivationsC.opportunitiesD.instructions
小题17:
A.anxiousB.awareC.eagerD.crazy
小题18:
A.shookB.removedC.toreD.mixed
小题19:
A.stateB.stressC.imagineD.complain
小题20:
A.mostlyB.possiblyC.reallyD.exactly
题型:问答题 简答题

市场运行良好,需要政府、市场与社会这样一个国家治理三维结构得以有效地耦合。完全独立于政府之外的放任自由市场不是万能的,市场在许多情景下往往会失灵,如垄断、贫富两极分化、外部性、失业、公共物品供给不足等,从而导致资源无效率配置和各种社会问题。这段文字主要强调的是()

A.市场经济社会引发贫富两级分化等问题

B.市场一旦失灵会导致各种社会问题

C.市场经济运行良好在于政府的作用

D.市场经济不能完全独立于政府之外

题型:问答题 简答题

设某租赁设备的成本为100万元,分3年6期偿还租金,年利率为8%,附加率为r=5%,求平均每期租金与租金总额各是多少?

更多题库