苗木修剪质量应符合下列规定()。 A.剪口平滑,不得劈裂 B.枝条短截时应留外向芽,

题型:多项选择题

问题:

苗木修剪质量应符合下列规定()。

A.剪口平滑,不得劈裂

B.枝条短截时应留外向芽,剪口应距离芽位置以上1cm

C.修剪直径2cm以上大枝及粗根时,截口必须削平并涂防腐剂

D.修剪时应先将枯枝、病虫枝、树皮劈裂枝剪去,对过长枝应加以控制

考点:市政公用工程继续教育市政公用工程继续教育题库
题型:多项选择题

完全正相关的证券A和证券B,其中证券A方差为30%,期望收益率为14%,证券B的方差为20%,期望收益率为12%。在不允许卖空的基础上,以下说法中,正确的有()。

A.最小方差证券组合为B

B.最小方差证券组合为40%A+60%B

C.最小方差证券组合的方差为24%

D.最小方差证券组合的方差为20%

题型:多项选择题

若xm=3,xn=4,则xm+n的值为(  )

A.12

B.7

C.81

D.64

题型:多项选择题

阅读理解。

     The influence of America is increasing in my country. Spanish people drink Coca Cola,

wear blue jeans, watch Hollywood movies, listen to American music, and eat fast food, and

they do these things every day.

    I think that American movies are a good way to spread American culture because people

are often influenced by what they see in the movies. Most of the programs and documentaries

(纪录片) we watch on TV are from America, and most of the movies we go to see are made

in Hollywood.

    In the last few years, the government has tried to protect the Spanish movies. Now, in our

cinemas, at least twenty percent of the movies which are shown must be from Spain or from

other countries in Europe.

    American culture is a part of Spanish life now. It's certain that many things from America

are as much a part of people's lives as Spanish things. For example, Coca Cola is as familiar

to everybody as any typical Spanish product. I've known about Coca Cola for my whole life.

    However, it's different with Western fast food. For example, I don't think McDonald's is as

successful in Spain as it is in other countries. In my opinion, one of the reasons may be the

lifestyle of the Spanish people. The Spanish people normally eat at home.

    On the other hand, maybe McDonald's hamburgers will eventually replace the famous

Spanish tapas. It's true that in every city in Spain you can find a McDonald's, and it is more

popular among the Spanish children than among the adults. In any case, it's obvious that

American culture is becoming more and more a part of our lives every day.

1. From the first paragraph we can know that ____.

A. the influence of America on Spain can be found everywhere

B. most Spanish people don't like to listen to their own music

C. fast food spreads from Spain to the United States

D. some Spanish actors go to America to improve their acting skills

2. Why did the government set some rules for the films shown in Spain?______

A. To protect foreign culture in Spain.

B. To earn more money from Spanish films.

C. To limit the number of foreign movies.

D. To unite the European Community.

3. Why does the author think that McDonald's is not as successful as it is in other countries? ______

A. Its fast food contains too much fat.

B. He thinks it is unhealthy.

C. Spanish people seldom eat out.

D. Spanish adults don't like its fast food.

题型:多项选择题

ICC(C)相当于()

A.平安险

B.一切险

C.水渍险

D.战争险

题型:多项选择题

由系统通过逻辑设备表实现逻辑设备到物理设备的映射。当更换物理设备时,用户的程序不用改,仅需修改逻辑设备表。

更多题库