物质间存在着一定的反应关系和转化关系。下列各组物质可以按所给图示进行直接转化的是

题型:选择题

问题:

物质间存在着一定的反应关系和转化关系。下列各组物质可以按所给图示进行直接转化的是

[ ]

A.Fe→Fe2O3→FeSO4→Fe

B.CO→CO2→H2CO3→CO

C.HCl→NaCl→CaCl2→HCl

D.CO2→Na2CO3→CaCO3→CO2

考点:物质的相互转化和制备
题型:选择题
It happened to a very young pastor (牧师).His church was very old and what's worse, a storm knocked a hole in the wall of the church.
One day the pastor1_____an auction(拍卖)and bid a beautiful tablecloth for six dollars. Hecarried the cloth back to the church and put it up on the wall. It completely hid the 2_____!
Just before noon of Christmas Eve, the pastor noticed a woman standing in the cold at the bus stop. “The 3 _____won’t be here for 40 minutes!” he called, and he invited her into the church to get 4_____ .She told him that she had come from the city to be interviewed for ajob as governess to the children of one wealthy family in town but she had been turned down.
The woman saw the tablecloth and rose suddenly. The pastor smiled and started to tell her about the storm 5_____, but she didn’tseem to 6_____“It is mine!” she said. “My husband had the cloth made 7_____ for mc !
She explained that she and her husband decided to go separately in the War II. They planned that he would 8_____ her. But she never saw him again. Later she heard that he had died. The pastor tried to 9_____ her, advising her to take the cloth with her. She 10_____ . Then she went away.
On Christmas Eve, after the service in church, one middle-aged man—the local clock-and-watch repairman—looked rather 11_____.‘‘It is strange,”he said in his soft accent.
Many years ago, my wife and I owned such a cloth.
The pastor suddenly became very 12_____ . He told him about the woman who had been in church 13_____ in the day.Together the two got in touch with the 14_____ who had interviewed her. And this man and his wife -who had been separated through so many saddened 15_____were reunited.
小题1:
A.hadB. attendedC. heldD. took
小题2:
A.wallB. churchC. holeD. table
小题3:
A.bossB. companyC. trainD. bus
小题4:
A.warmB. readyC. coolD. calm
小题5:
A.damageB. storyC. factD. truth
小题6:
A.workB. believeC. listenD. understand
小题7:
A.carefullyB. attentivelyC. finallyD. especially
小题8:
A.joinB. writeC. bringD. leave
小题9:
A.amuseB. comfortC. pleaseD. help
小题10:
A.criedB. acceptedC. refusedD. continued
小题11:
A.puzz ledB. delightedC. determinedD. disappionted
小题12:
A.sadB. shockedC. hopefulD. excited
小题13:
A.laterB. earlierC. warmerD. colder
小题14:
A.womanB. managerC. husbandD. family
小题15:
A.weeksB. countriesC. ChristmasesD. centuries
题型:选择题

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A、大于

B、小于

C、等于

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往复泵活塞往复()次完成一个工作循环。

A、1

B、2

C、3

D、4

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汕头成为潮汕地区的政治经济文化中心,是在()之后。

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电子货币的种类包括()。

A.数字现金

B.银行卡

C.电子钱包

D.转帐支票

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