下列有关碳及其氧化物的说法错误的是 A.CO与CO2可用澄清石灰水区分 B.CO

题型:选择题

问题:

下列有关碳及其氧化物的说法错误的是

A.CO与CO2可用澄清石灰水区分

B.CO具有还原性,可用于铁的冶炼

C.CO与CO2均有可燃性

D.CO2能溶于水,水溶液呈酸性;CO难溶于水,但能燃烧

考点:二氧化碳的制取和收集安全措施和生活经验自然界中的碳循环一氧化碳的毒性
题型:选择题

—Would you like some _____.

—Oh, yes, just a little. [ ]

A. milk

B. apple

C. pears

D. oranges

题型:选择题

阅读理解。

     As prices and building costs keep rising, the "do-it-yourself" (DIY) trend (趋势) in the U.S. continues to

grow. "We needed furniture for our living room," says John Ross, "and we just didn't have enough money to

buy it. So we decided to try making a few tables and chairs." John got married six months ago, and like many

young people these days, they are struggling to make a home at a time when the cost of living is very high.

The Rosses took a 2-week course for $ 280 at a night school. Now they build all their furniture and make

repairs around the house.

    Jim Hatfield has three boys and his wife died. He has a full-time job at home as well as in a shoe making

factory. Last month, he received a car repair bill for $ 420. "I was deeply upset about it. Now I've finished a

car repair course, I should be able to fix the car by myself."

    John and Jim are not unusual people. Most families in the country are doing everything they can to save

money so they can fight the high cost of living. If you want to become a "do-it-yourselfer", you can go to

DIY classes. And for those who don't have time to take a course, there are books that tell you how you can

do things yourself.

1. We can learn from the text that many newly married people _____. [ ]

A. find it hard to pay for what they need

B. have to learn to make their own furniture

C. take DIY courses run by the government

D. seldom go to a department store to buy things

2. John and his wife went evening classes to learn how to _____. [ ]

A. run a DIY shop

B. make or repair things

C. save time and money

D. improve the quality of life

3. Jim Hatfield decided to become a do-it-yourselfer when _____. [ ]

A. his car repairs cost too much

B. the car repair class was not helpful

C. he could no possible do two jobs

D. he had to raise the children all by himself

4. What would be the best title for the text? [ ]

A. The Joy of DIY

B. You Can Do It Too!

C. Welcome to Our DIY Course!

D. Ross and Hatfield: Believers in DIY.

题型:选择题

下述关于航空噪声危害的大理由叙述中,错误的是()。

A.飞机起飞或降落时的噪声级最大

B.超声速飞机低空飞过时产生轰声

C.喷气机的噪声是以金属性的低频成分为主

D.喷气机的声功率为10KW以上,声功率级高达160dB以上

题型:选择题

急性普通型肝炎的病变特点是()

A.肝细胞广泛变性,坏死严重

B.肝细胞广泛变性,炎细胞浸润明显

C.肝细胞广泛变性,坏死轻微

D.肝细胞广泛变性,淤胆明显

E.肝细胞广泛变性,Kupffer细胞增生活跃

题型:选择题

物质无非是各种物的总和,是从这种总和抽象出来的。这种观点属于()

A、辩证唯物主义物质观

B、形而上学唯物主义物质观

C、庸俗唯物主义物质观

D、朴素唯物主义物质观

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