关于声现象中,以下知识结构错误的是()

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问题:

关于声现象中,以下知识结构错误的是( )

考点:回声及回声测距离的应用
题型:选择题

Delphi具有良好的数据处理能力,它所提供的哪一个工具可将数据从一种数据库全部或部分迁移到另一种数据库中

A.DataPump

B.Data base Explorer

C.BDE

D.ODBC

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Changsha,

Hunan Province

May 6, 2010

Dear editor,

Under China’s current educational system, there are those who do nothing but study. They of course are thought to be model students.

But I feel that there is another type of student who, perhaps not as diligent (勤奋的) as the first type, uses his time more efficiently and achieves a lot academically.

Last year, a classmate of mine was accepted by a top university. It surprised all of us. It was because, unlike most of us, he didn’t spend too much of his time studying.

When I asked him the secret of his success, he said that the key was properly and scientifically arranging his time.

“ I spent a lot of time keeping fit and as a result, I was able to better concentrate (集中) on my class work.”

The moral of the story is: it isn’t necessary to sit at your desk all day long to get high academic (学术) grades.

Yours,

Zhang Zishu

小题1:What does the letter-writer (a reader) think leads to the fact that many students do nothing but study?

A.The present educational system.

B. People’s old ideas.

C.The teaching methods.

D.The parents of these students.小题2:It seems that this reader thinks        .

A.the first type of student is our model

B.the second type of students is our model

C.both types of students are worth learning from

D.neither of the two types of students are good小题3: The secret of his classmate’s success was        .

A.properly and scientifically arranging his time

B.spending a lot of time studying

C.doing nothing but studying

D.playing all the time小题4: The reader wrote the letter in order to        .

A.call on us to work even harder

B.cause people to think about how to study more efficiently

C.advise people to do research into his classmate’s success

D.criticize (批评) China’s educational system小题5:What would be the best to stand for the letter-writer’s opinion?

A.Secret of success.

B.China’s educational system needs changing.

C.Work while you work and play while you play.

D.Keep fit first.

题型:选择题

下列树木中,()果实为核果。

A.桑树

B.构树

C.杜鹃

D.樱花

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高锰酸钾鉴别不饱和巴比妥类药物时

A.一般在碱性溶液中进行

B.一般在酸性溶液或加热条件下进行

C.可以使高锰酸钾溶液变成紫色

D.高锰酸钾转变为锰酸钾

E.可以用于苯巴比妥的鉴定

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某女,48岁,患更年期综合征2年,症见烘热汗出,心烦易怒,少寐健忘,头晕耳鸣,口渴咽干,四肢酸楚。证属肝肾阴虚,宜选用的成药是()。

A.坤宝丸

B.宫血宁胶囊

C.乌鸡白凤丸

D.益母草颗粒

E.妇科十味片

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