问题 填空题

在实验室中,配制500g0.9%的生理盐水:

(1)该实验必备的仪器有托盘天平、药匙、胶头滴管、量筒、细口瓶、烧杯和     

(2)该实验的主要步骤有计算、       、溶解、装瓶并贴标签。

答案

(1)玻璃棒 (2)称量(量取)

先计算需要氯化钠:500g×0.9%=4.5g,需要水495.5毫升.用托盘天平称量4.5g氯化钠(用药匙取氯化钠)放入烧杯中,用量筒量取495.5毫升水(用到胶头滴管)倒入烧杯中,再用玻璃棒搅拌进行溶解,最后将配得的溶液转移到细口瓶中,再贴上标签存放.故答案为(1)玻璃棒;(2)称量

阅读理解

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项,选项中有两项为多余选项。

 小题1: 

Today,kids have more worries and face more pressures than ever before. Here are a few tips to help your child focus on and do well in school.

●Create a personal schedule

Recording everything that must be done on a calendar or “to do” list will help him to keep track of important dates and deadlines. If he keeps it in a visible place he will have no problem acknowledging upcoming events and will be better able to plan how and where to spend his time.

●Watch the clock

 小题2:  I also recommend setting his clock or watch five minutes ahead since it's always easy to run late. When it comes to something like catching a bus,just five minutes can make a significant difference.

●Focus

He should train himself to be able to concentrate alone on one specific task. This is much easier in a noise­free environment. No TV or radio should be on to distract him.

 小题3: 

Lack of sleep is proven to harm us physically. The more sleep we get,the more alert we are. We thus have more energy to handle life's daily tasks. The average adult needs at least six hours of sleep a night and the average child needs at least eight.

●Stay in shape

Through spending time outdoors or playing sports with friends,he can “blow off some steam” so to speak,as well as re­energize. 小题4: 

●Talk through your problems

Be able to share his concerns with you.  小题5:  If you make it clear that you understand him and are willing to help,not only will you contribute to his emotional health but you'll help build an open and honest relationship as well.

A.Sharing feelings often makes them easier to deal with.

B.Help your child work better to realize his aim.

C.Setting an alarm for the morning is a must.

D.Get enough sleep.E.Help your child do better in school.

F.Encourage your child to be positive.

G.Encourage him to get outside.

问答题 简答题