根据风的示意图回答: 小题1:图示为高空的风还是近地面的风?____原因是__

题型:综合

问题:

根据风的示意图回答:

小题1:图示为高空的风还是近地面的风?____原因是______________。图示符号代表风向的是____,其余各力分别是________________。

小题2:A的特点是________;C的方向是________;若没有D的影响,B的方向为________。

小题3:在图示各力中,既影响风向又影响风速的是________。

小题4:EF两处风速较大的是____。原因是_____________

考点:大气的水平运动热力环流
题型:综合

(2分)食品保鲜剂可以有效地防止食品的腐败变质。食品保鲜的措施有添加防腐剂、填充保护气体、放置干燥剂和脱氧保鲜剂。请回答:

(1)可作为食品保鲜剂,且被称作“双吸剂”的物质的化学式为             

(2)用文字解释为什么该物质被称为“双吸剂”?                                

题型:综合

软件缺陷产生的原因有______。

A.技术问题

B.团队工作

C.软件本身

D.以上全部

题型:综合

阅读理解

     Most Americans get what money they have from their work;that is ,they earn an income from wages

or salaries.The richest Americans,however,get most of their money from what they own-their stocks,

bonds,real estate,and other forms of property,or wealth.Although there are few accurate statistics to go by,

wealth in American society appears to be concentrated in very few hands.More than 20 percent of

everything that can be privately owned is held by less than one percent of the adult population and more

than 75 percent of all wealth is owned by 20 percent of American adults.The plain fact is that most

Americans have no wealth at all aside from their homes,automobiles,and a small amount of savings.

     Income in the United States is not as highly concentrated as wealth.In 1917 the richest 10 percent of

American families received 26 percent of all income,while the poorest 10 percent received 17 percent,

mainly from Social Security and other government payments.The most striking aspect of income

distribution is that it has not changed significantly since the end of World War ?.Although economic growth

has roughly doubled real disposable(可自由使用的)family income(the money left after taxes and adjusted

for inflation)over the last generation,the size of the shares given to the rich and the poor is about the same.

By any measure economic inequality is great in the United States.

     The reality behind these statistics is that a large number of Americans are poor.In 1918,14 percent of

the population was living below the federal government's poverty line,which at that time was an annual

income of $9,287 for a nonfarm family of two adults and two children.In other words,about one out of

seven Americans over 31 million people was officially considered unable to buy the basic necessities of

food,clothes,and shelter.The suggested poverty line in 1981 would have been an income of about $11,200

for a family of four.By this relative definition,about 20 percent of the population or more than 45 million

Americans are poor.

1.What does the majority of the Americans have in terms of wealth?

A. Their income and savings.

B. Everything they own in their homes.

C. Actually,they have no wealth at all.

D. Their house,cars and small amounts of savings

2.What is the percentage of wealth that is in the hands of most Americans?

A. More than 25%.  

B. Less than 25%.

C. More than 75%.  

D. Less than 20%.

3.Why is economic inequality still great in the US in spite of the economic growth?

A. Because the proportion of income received by the rich and the poor remains almost the same as in

      1917.

B. Because the economic growth has widened the gap of the family income between the rich and the

      poor.

C. Because income in the US is still concentrated in the hands of the richest 10% of American families.

D. Because some Americans made great fortunes during the Second World War.

4.What can we learn from comparison of the two poverty lines in the last paragraph?

A. The poverty line of 1918 is more favorable to the poor than that of 1981.

B. The 1981 line didn't leave much to the poor.

C. There were more Americans who were officially poor by the 1981 line.

D. There were more Americans who were officially poor by the 1918 line

题型:综合

关于旋毛虫病的预后,正确的是()

A.大多预后良好

B.血象高者预后差

C.取决于感染程度与个体反应程度

D.重度感染导致主要脏器有严重并发症且未能及时治疗者预后较差

E.病死率约5%~6%

题型:综合

南航波音737-800发动机的余油排放口漏油限制标准在哪一章可以找到()

A、AMM71-00-00

B、AMM71-71

C、FIM71-71

D、AMM72-71

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