下图为某同学在实验室制取CO2并检验CO2性质的实验装置示意图. (1)容器A

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问题:

下图为某同学在实验室制取CO2并检验CO2性质的实验装置示意图.

(1)容器A中反应的化学方程式______.

(2)该同学在实验过程中,将A中产生的气体通入到B中,观察到澄清石灰水没变浑浊,则说明A瓶产生的CO2气体中混有______.

(3)由于上述原因,该同学把容器中的浓盐酸换成稀盐酸,将A中产生的气体通入到C中并收集满,再向C中倒入浓NaOH溶液,迅速用安有玻璃导管(在其下端绑好一个小气球)的胶塞塞紧,振荡,可以观察到小气球______.请写出C中反应的化学方程式______.

(4)A装置也能用来制取______;制取该气体的化学方程式______.

考点:二氧化碳的制取和收集二氧化碳的性质
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有一首流行歌曲唱道“生活是一条路,怎能没有坑坑洼洼;生活是杯酒,饱含着人生的酸甜苦辣。”这说明[     ]

A.现阶段,我国人民的生活水平还比较低

B.流行歌曲是生活的写照

C.挫折总是难免的,是人生经历中不可缺少的一部分

D.人生时时刻刻都要经历挫折

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     It was the summer of 1965. DeLuca, then 17, visited Peter Buck, a family friend. Buck asked DeLuca about his plans for the future. "I'm going to college, but I need a way to pay for it , "DeLuca recalls saying. " Buck said ,'You should open a sndwich shop.'"      

     That afternoon, they agreed to be partners. And they set a goal: to open 32 stores in ten years. After doing some research, Buck wrote a check for ﹩1000. DeLuca rented a storefront(店面 ) in Connecticut, and when they couldn't cover their start-up costs, Buck kicked in another ﹩1000.      

     But business didn't go smoothly as they expected. DeLuca says, "After six months, we were doing poorly, but we didn't know how badly, because we didn't have any financial controls.” All he and Buck knew was that their sales were lower than their costs.      

     DeLuca was managing the store and going to the University of Bridgeport at the same time. Buck was working at his day job as a nuclear physicist in New York. They'd meet Monday evenings and brainstorm ideas for keeping the business running. "We convinced ourselves to open a second store. We figured we could tell the public, ‘We are so successful, we are opening a second store.’" And they did-in the spring of 1966. Still, it was a lot of learning by trial and error.      

     But the partners' learn-as-you-go approach turned out to be their greatest strength. Every Friday, DeLuca would drive around and hand-deliver the checks to pay their suppliers. “'It probably took me two and a half hours and it wasn't necessary, but as a result, the suppliers got to know me very well, and the personal relationships established really helped out,  "DeLuca says.      

     And having a goal was also important. "There are so many problems that can get you down. You just have to keep working toward your goal, "DeLuca adds.      

     DeLuca ended up founding Subway Sandwich, the multimillion-dollar restaurant chain.

1. DeLuca opened the first sandwich shop in order to____________.      

A. support his family      

B. pay for his college education      

C. help his partner expand business      

D. do some research

2. Which of the following is true of Buck?   

A. He put money into the sandwich business.    

B. He was a professor of business administration.    

C. He was studying at the University of Bridgeport.    

D. He rented a storefront for DeLuca.

3. What can we learn about their first shop?      

A. It stood at an unfavorable place.      

B. It lowered the prices to promote sales.      

C. It made no profits due to poor management.      

D. It lacked control over the quality of sandwiches.

4. They decided to open a second store because they _________.    

A. had enough money to do it    

B. had succeeded in their business    

C. wished to meet the increasing demand of customers    

D. wanted to make believe that they were successful

5. What contributes most to their success according to the author?    

A. Learning by trial and error.      

B. Making friends with suppliers.      

C. Finding a good partner.      

D. Opening chain stores.

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黄体萎缩不全者( )。

A.月经前或月经来潮6小时内进行诊断性刮宫
B.月经干净后3天进行诊断性刮宫
C.在月经第3天进行诊断性刮宫
D.在月经第5天进行诊断性刮宫
E.月经周期任何日期内均可进行诊断性刮宫

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某集团公司在一家银行开设了许多不同的银行账户,那么,该集团公司可以要求银行在考虑其利息及透支限额时将其子公司的账户余额集中起来,下列不属于现金余额集中的好处是( )。

A.盈余与赤字相抵
B.加强控制
C.增加投资机会
D.匹配

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某船在机器处所仅设了一个舱底水吸口,是否可以?为什么?

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