取铜、银合金300mg溶于硝酸,得到相应的硝酸盐.加适量蒸馏水稀释后,加入5g氯

题型:问答题

问题:

取铜、银合金300mg溶于硝酸,得到相应的硝酸盐.加适量蒸馏水稀释后,加入5g氯化钠溶液,恰好完全反应,得到344.4mg白色沉淀.求合金中铜、银的质量分数各是多少______;

氯化钠溶液中溶质质量分数是多少?______.

考点:化学反应方程式的计算金属活动性
题型:问答题

六淫邪气中易于生风的是( )。

A.湿

B.寒

C.风

D.燥

E.火

题型:问答题

不符合木材选用原则的是

A.安全

B.适用

C.经济

D.美观

题型:问答题

下列变化属于化学变化的是(  )

A.干冰升华

B.烟花燃放

C.石蜡熔化

D.活性炭吸附

题型:问答题

Britons Learn to Forgive

LEEDS, England ─ A Leeds University psychology (心理学) professor is teaching a course to help dozens of Britons forgive their enemies.

“The hatred we hold within us is a cancer,” Professor Ken Hart said, adding that holding in anger can lead to problems such as high blood pressure and heart disease.

More than 70 people have become members in Hart’s first 20-week workshop in London ─ a course he says is the first of its kind in the world.

These are people who are sick and tired of living with a memory.They realize their bitterness is a poison they think they can pour out, but they end up drinking it themselves, said Canadian-born Hart.

The students meet in groups of eight to ten for a two-hour workshop with an adviser every fortnight.

The course, ending in July, is expected to get rid of the cancer of hatred in these people.“People have lots of negative attitudes towards forgiveness,” he said, “People confuse forgiveness with forgetting.Forgiveness means changing from a negative attitude to a positive one.”

Hart and his team have created instructions to provide the training needed.

“The main idea is to give you guidelines on how to look at various kinds of angers and how they affect you, and how to change your attitudes towards the person you are angry with,” said Norman Claringbull, a senior expert on the forgiveness project.

Hart said he believes forgiveness is a skill that can be taught, as these people “want to get free of the past”.

小题1:From this passage we know that _________.

A.high blood pressure and heart disease are caused by hatred

B.high blood pressure can only be cured by psychology professors

C.without hatred, people will have less trouble connected with blood pressure and heart

D.people who suffer from high blood pressure and heart disease must have many enemies小题2:In Hart’s first 20-week workshop, people there can ________.

A.meet their enemies 

B.change their attitudes towards bitterness

C.enjoy the professor’s speech

D.learn how to quarrel with others小题3:If you are a member in Hart’s workshop, you’ll ________.

A.pay much money to Hart

B.go to the workshop every night

C.attend a gathering twice a month

D.pour out everything stored in your mind小题4:The author wrote this passage in order to ________.

A.persuade us to go to Hart’s workshop

B.tell us the news about Hart’s workshop

C.tell us how to run a workshop like Hart’s  

D.help us to look at various kinds of angers

题型:问答题

消费者享有的人身、财权利包括哪些内容?

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