为测定某NaCl、Na2CO3固体混合物的组成,小明同学取16g该混合物样品放入

题型:问答题

问题:

为测定某NaCl、Na2CO3固体混合物的组成,小明同学取16g该混合物样品放入烧杯中,称得烧杯及所盛固体混合物的总质量为98g,再把100g稀盐酸分四次平均分成四份依次加入盛有固体样品的烧杯中,每次都充分反应.实验数据如:

加入稀盐酸的次数第一次第二次第三次第四次
烧杯及反应后混合物的总质量/g121.4144.8168.6193.6
请分析以上数据后计算:

(1)第一次加入稀盐酸充分反应后,生成二氧化碳的质量是______g.

(2)该固体混合物中碳酸钠的质量分数?

(3)根据实验数据,在右边的坐标纸上绘制出所加稀盐酸质量与生成气体质量关系的曲线(不要求写出计算过程,只画出曲线即可)

考点:化学实验数据的分析化学反应方程式的计算酸的性质盐的性质
题型:问答题

第三部分:阅读理解(共20小题;每小题2分,满分40分)

阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项。

There is no clear advice on how to use your body language. What you do might be interpreted(诠释)in several ways, depending on the surroundings and who you are talking to. You’ll probably want to use body language differently when talking to your boss compared to when you talk to a girl you’re interested in. The following are some effective ways to improve your body language.

First, to change your body language you must be aware of your body language. Notice

how you sit, how you stand , how you use your hands and legs, and what you do while talking to someone.

You might want to practice in front of a mirror. It might seem silly but no one is watching you. This will give you good feedback(反馈)on how you look to other people and also give you an opportunity to practice a bit before going out into the world.

Another tip is to close your eyes and visualize how you would stand and sit to feel confident, open and relaxed or whatever you want to communicate. See yourself move like that version of yourself. Then try it out.

You might also want to observe friends, role models, movie stars or other people you think have good body language. Observe what they do and you don’t and take bits and pieces you like from them. Try using what you can learn from them.

Some of these tips might seem like you are faking(假装) something. But fake it till you make it a useful way to learn something new. And remember, feelings work backwards too. If you smile a bit more you will feel happier. If you sit up straight you will feel more energetic and in control. If you slow down your movements you’ll feel calmer.

56.What’s the purpose of the passage?

A.To show the importance of body language.

B.To compare spoken language with body language.

C.To give some tips on improving body language.

D.To introduce different kinds of body language.

57.We can learn from the passage that_________.

A.body language is not as important as spoken language.

B.movie stars and models always have good body language.

C.using more body language can make us more popular.

D.different body language should be used in different situations.

58.The underlined word “visualize” in Paragraph 4 means_________.

A.see in one’s mind                    B.discuss with somebody   

C.look in the mirror                    D.Practice again and again

59.What does the author mainly want to say in the last paragraph?

A.Don’t hide your true feelings.         B.It’s a good idea to imitate some people .

C.Try to stay calm all the time.         D.Go on learning more about body language.

题型:问答题

操作中应选用的仪器是

标定四苯硼钠液(0.02mol/L)时,精密量取本液10ml

A.量筒
B.分析天平(感量0.1mg)
C.台秤
D.移液管
E.容量瓶

题型:问答题

某私营企业会计刘某涂改账目,将公司巨额资金据为已有。刘某的行为构成( )。

A.贪污罪

B.侵占罪

C.职务侵占罪

D.挪用资金罪

题型:问答题

高考语文(正题)、数学(正题)、外语、选测科目、附加题各科考试时间分别是()分钟

A、150、120、120、100、30

B、150、120、120、120、30

C、180、150、120、100、30

D、180、150、120、75、30

题型:问答题

撤销保证金账户时,承兑申请人应向开户银行公司业务部门提交“撤销银行 承兑汇票保证金账户申请书”。

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