熔焊焊接铜合金时,气孔出现的倾向比低碳钢()。A、稍低 B、低很多 C、稍高 D、严

题型:单项选择题

问题:

熔焊焊接铜合金时,气孔出现的倾向比低碳钢()。

A、稍低

B、低很多

C、稍高

D、严重得多

考点:焊工技能考试焊工技能考试题库
题型:单项选择题

把9个蘑菇放在2个篮子里,不管怎样总有一个篮子至少有______个.

题型:单项选择题

下列关于回归平方和的说法,正确的有()。

A.自变量的变动对因变量的影响引起的变差

B.无法用回归直线解释的离差平方和

C.回归值与均值离差的平方和

D.实际值y与均值离差的平方和

E.总的变差平方和与残差平方和之差

题型:单项选择题

造字传说有哪几种()

A、伏羲画卦说

B、神农结绳说

C、仓颉造字说

题型:单项选择题

阅读理解

     Cleveland has won the distinction of being the worst city in the United States, according to a new

survey. The city has high unemployment, terrible weather, heavy taxes, and ordinary sports teams, all of

which have pushed it to the No. 1 position in the Forbes.com list.

     "Cleveland was the only city that fell in the bottom half of rankings in all nine categories. And it has been entitled with a less than endearing nickname: the Mistake by the lake," Forbes said on its website,

     The economic downturn hit cities across the United States last year particularly in the mid-west section of the country. Crime and unemployment secured the No. 2 spot for Stockton, which held the top position in last year's ranking. Memphis got third place thanks to its violent crime rate and the number of officials who are guilty, while the poor auto industry drove the Michigan cities of Detroit and Flint into the top five.

     "A lot of the cities that showed up on our list are going through hard times fight now, dealing with high

unemployment, with declining producing bases. Many have experienced strong movement out of the city

over the last 20 and 30 years."

     Despite (尽管) its fine weather, Miami scored in the bottom 10 percent in commuting (上下班往返)

time, and violent crime which sent it into sixth place.

     "One of the biggest surprises is Miami. The good weather and no state income taxes blur some of the

severe problems that Miami has related to crime as well as long commutes," Badenhausen added.

     Florida was followed in the poor ranking by St Louis, Buffalo, Canton, Ohio and Chicago, which has the country's highest sales tax at 10.25 percent. New York, the nation's biggest city, is rich in culture but its

lengthy commuting time and high income taxes pushed it into 16th place.

1. From the text we can learn that ______.

A. Cleveland has been entitled a lovely nickname

B. the economic downturn hit cities in the mid-east section

C. Miami scored in the bottom 10 percent in all nine categories

D. commuting time in New York is too long

2. What information can be inferred according to the text?

A. The number of officials who are guilty is large in Memphis.

B. Stockton got second place in last year's ranking.

C. High income taxes made New York get 16th place.

D. Ohio has the country's highest sales tax.

3. The word "blur" underlined in the last paragraph but one probably means ______.

A. make it possible  

B. make it unclear  

C. make if obvious  

D. make it important

4. Which of the following is the correct ranking order?

A. Cleveland, Detroit, Miami, Buffalo, Florida.

B. Stockton, Miami, Flint, Florida, Canton.

C. Cleveland, Stockton, Miami, Chicago, Florida.

D. Stockton, Detroit, Miami, Florida, St Louis.

题型:单项选择题

Mrs. Brown, who is breast-feeding, asks the nurse if she should supplement breast- feeding with formula feeding. The nurse bases the response on which of the following

A. Formula feeding should be avoided to prevent interfering with the breast milk supply.
B. Primarily, water supplements should be used to prevent jaundice.
C. Formula supplements can provide nutrients not found in breast milk.
D. More vigorous sucking is needed for a bottle-feeding, so supplements should be avoided.

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