问题 选择题

下列反应属于复分解反应的是(  )

A.Fe2O3+3CO

高温
.
2Fe+3CO2

B.2NaOH+H2SO4═Na2SO4+2H2O

C.3NO2+2H2O═2HNO3+NO

D.H2+CuO

加热
.
Cu+H2O

答案

A、Fe2O3+3CO

高温
.
2Fe+3CO2,该反应的生成物中铁属于单质,不是两种化合物相互交换成分生成两种新的化合物的反应,不属于复分解反应,故选项错误.

B、2NaOH+H2SO4═Na2SO4+2H2O,该反应是两种化合物相互交换成分生成两种新的化合物的反应,属于复分解反应,故选项正确.

C、3NO2+2H2O═2HNO3+NO,该反应不是两种化合物相互交换成分生成两种新的化合物的反应,不属于复分解反应,故选项错误.

D、H2+CuO

加热
.
Cu+H2O,该反应是一种单质和一种化合物反应生成另一种单质和另一种化合物的反应,属于置换反应,故选项错误.

故选:B.

阅读理解

阅读理解。

     What makes people happier:money or having happy friends and neighbors? Scientists have found

an answer as part of a study.    

     The new study found that friends of happy people had a greater chance of being happy themselves.

And the smaller the distance between friends,the larger the effect they had on each other's happiness.      

     For example,a person was 20% more likely to feel happy if a friend who lived within  l. 5 kilometers.

Having a happy neighbor who lived next door increased the chance of being happy by 34%. The effects

of friends' happiness lasted for up to a year.      

    The scientists found that sadness also spread among friends,but not as much as happiness.      

     People who take 3 degrees out of' separation still had an effect on a person's happiness.3 degrees

of separation means the friend of a friend of a friend.      

     The study showed that having an extra 5 ,000 dollars increased a person's chances of becoming

happier by about 2 percent. But the researchers found that the influence of a friend of a friend of a

friend can be greater than that.

1. The effects of happiness from friends ____.    

A. have a chance of 20%  to make you happy    

B. are usually within l.5km    

C. have a chance of 34% to make you happy    

D.can last about a year

2. The word "spread" in the fourth paragraph means in China?    

A. 传播    

B. 流行    

C. 分享    

D. 兴盛

3. Having a happy friend who lives within one and a half kilometers increases a chance of being

    happy by____.

A. 45%    

B. 50%    

C. 34%    

D. 20%

4. Which of the followings has the greatest effect on happiness according to the passage?    

A. Money.    

B. The friend of a friend.    

C. Happy friends who live in another city.    

D. Happy neighbors.

5. From this passage we know ____.  

A. who's the happiest  

B. what's happiness  

C. what makes people happier  

D. how to make people happy

单项选择题

2009年以来,山东省工业生产增速呈波动回升态势,8月份规模以上工业增加值增长15.0%,比年初增速提高3.3个百分点。1~8月,累计实现增加值12188.4亿元,增长12.6%,较上半年增速提高0.6个百分点,比全国平均增速快4.5个百分点。工业品产量回升面继续扩大,增势稳步升高。8月份,在国家重点调度的120种工业产品中,有95种产品产量同比增长,占重点调度产品的79.0%,占比较7月份提高14.0个百分点;增速较7月份提高的有77种,占重点调度产品的64.2%。
1~8月,全社会固定资产投资完成12872.1亿元,增长23.0%,增幅比上半年提高0.2个百分点,同时提高1.5个百分点。其中,城镇投资10557.4亿元,增长22.7%,增幅比上半年提高0.2个百分点。第一、二产业投资保持稳定增长,依次增长19.2%和16.2%;第三产业投资增速加快,增长33.0%,增幅比上半年提高1.0个百分点;上年同期的三次产业投资构成之比为3.9:56.3:39.8。1~8月,房地产开发投资完成额1507.0亿元,增长22.5%,比全国平均增速高7.8个百分点。房屋销售面积3424.1万平方米,增幅由上半年、1~7月的11.0%、19.5%提升至24.9%。
今年以来,全省消费市场逐步走强,社会消费品零售额增长由2月份的14.4%增至8月份的18.8%,提高4.4个百分点。1~8月累计实现零售额7808.4亿元,增长18.1%,增速同比回落5.4个百分点,比上半年提高0.2个百分点,比全国平均增速高3.0个百分点;扣除价格因素,实际增长19.2%,同比提高2.4个百分点。其中,县以上城市市场实现零售额5075.0亿元,增长18.5%;县及县以下农村市场实现零售额2733.4亿元,增长17.4%。
8月份,居民消费价格比上月上涨0.3%,为自今年3月份以来首次出现月环比上涨。与上年同月比,居民消费价格下降0.7%,比上月降幅收窄0.1个百分点。1~8月,居民消费价格同比下降0.2%,继续延续上月累计同比价格首次出现的降势,降幅比前7个月扩大O.1个百分点,比全国平均降幅低1.0个百分点。8月份,原材料燃料动力购进价格和工业品出厂价格环比分别上涨0.6%和0.8%。与上年同月比,两类价格依次下降7.6%和8.8%,其中,工业品出厂价格同比自上年12月由升转降以来,降幅首次出现缩减,比7月份降幅收窄0.6个百分点。1~8月,两类价格累计同比分别下降5.6%和7.1%,较全国平均降幅依次低3.8个百分点和高0.7个百分点。

2009年1~8月,山东省三次产业投资构成之比为______。

A.3.2:57.7:39.1
B.3.4:58.5:38.1
C.3.8:53.2:43.0
D.4.3:51.2:44.5