简述“孔雀东南飞，五里一徘徊”在全诗中的作用

阅读理解。

      As a boy growing up on a farm near the Caribbean coast of Colombia(哥伦比亚), Alvaro

Cogollo loved both plants and vallenato, the traditional music of the region.As a biology student

in the 1970s, Cogollo traveled around the country to document its rich botanical heritage and,

informally, studied the music that tells an important story of Colombia.

     "We were colonized by the Spanish; later, Africans were brought as slaves to exploit gold

mines; and the native peoples were already here," he says."That is what authentic vallenato

represents with its three instruments: the accordion(手风琴), from a European origin; la caja drum,

which is of African origin; and la guacharaca, a beating instrument made from a palm tree, which is

from native American origin."

     Over the course of his nearly four-decade career, Cogollo has discovered more than 150 new

species of plants, 17 of which bear his name.Although Cogollo never earned a PhD, his colleagues

say he's made invaluable contributions to knowledge of Colombia's plant at a time when deforestation

(砍伐森林) is a big threat to the country' s biodiversity.Governments have focused on trying to move

 the country out of poverty and conflict through exploiting its natural resources, not through scientific

resource development.But Cogollo sees things a different way.By educating the public about alternative

uses for the land, and researching plants' potential uses-including as medicines, foods, and bio-fuels-

Golombia could improve its economy and quality of life without neglecting conservation, Cogollo says.

     Cogollo's other major achievement has been the transformation of a neglected botanical garden in a

Medellm neighborhood into a well-known center for research, environmental education, and community

gatherings.What had been a club for wealthy orchid enthusiasts now offers free admission and attracts

rich and poor alike.The success of the botanical garden has in turn contributed to the transformation

of Medellm.Once seriously damaged, by violent wars between armed groups, the city has had some

improvements that include better public safety, tougher pollution controls and the creation of green

spaces.

     What Cogollo has focused his latest efforts on is teaching Colombians from all social classes and

backgrounds about the importance of biodiversity and conservation through a shared musical heritage.

"The fact that Alvaro's been able to give talks to audiences filled with all kinds of people is very

important, and that's what happened in Medellm the first time he talked about vallenato music,"

Dr.Forcro says."People sitting there had no idea of environmental conservation, and then they did."

1. What's the main feature of vallenato music?

A. It records the history of Colombia．

B. It sounds like the voice of plants．

C. It plays with local instruments．

D. It has origins from all over the world．

2. While protecting the environment, Cogollo attached importance to ___．

A. the research of music

B. the protection of plants

C. the improvement of people's life

D. the communication with different people

3. The purpose of rebuilding the botanical garden is ____．

A. to raise the public's environmental consciousness

B. to set up a club for rich orchid enthusiasts

C. to give talks about vallenato music

D. to create a fair economic system

4. People from different backgrounds came to Cogollo's reports about biodiversity mainly because

of      .

A. their common interest in Vallenato music

B. their improved environmental consciousness

C. his popularity in environmental protection

D. his previous achievements in the city development

某高速公路全长50km，路面面层为三层式沥青混凝土结构。施工企业为公路交通大型企业专业施工队伍，设施精良。为保证工程施工质量，防止沥青路面施工中沥青混合料摊铺时发生离析、沥青混凝土路面压实度达不到要求和平整度及接缝达不到要求，施工单位在施工准备、沥青混合料的拌和、运输、摊铺、压实、接缝的处理等方面，做了如下工作：
(1)选用经试验合格的石料进行备料，严格对下承层进行清扫，并在开工前进行试验段铺筑；
(2)沥青混合料的拌和站设置试验层，对沥青混合料及原材料及时进行检验，拌和中严格控制集料加热温度和混合料的出厂温度；
(3)根据拌和站的产量，运距合理安排运输车辆，确保运输过程中混合料的质量；
(4)设置两台具有自动调节摊铺厚度及找平装置的高精度沥青混凝土摊铺机递进式施工，严格控制相邻两机的间距，以保证接缝的相关要求；
(5)压路机采用2台双轮双振压路机及2台16t胶轮压路机组成，严格控制碾压温度及碾压重叠宽度。
(6)纵缝采用热接缝，递进式摊铺，后摊铺部分完成，立即骑缝碾压，以除缝迹，并对接缝作了严格控制。
[问题]

沥青混凝土路面的碾压过程中，除了应严格控制碾压温度和碾压重叠宽度外，还应注意哪些问题

下列不属于证券经纪业务营业部管理方面法律法规的是（）。

A、《证券业从业人员资格管理办法》

B、《证券公司董事、监事和高级管理人员任职资格监管办法》

C、《证券从业人员行为守则（试行）》

D、《证券公司融资融券业务试点管理办法》

民法规定，一项允诺可以通过明示或默示方法作出。所谓明示，是行为人直接将自主决定的意思表示于外的允诺方法，包括口头明示和书面明示。 下列不属于明示范畴的是( )

A．用户以通话形式申请提供服务

B．用户到营业厅办理信用卡手续

C．开车到收费停车场停车

D．授权朋友办理服务申请

老一辈无产阶级革命家谢觉哉说：“雷锋同志是平凡的，任何人都可以学到；雷锋同志是伟大的，任何人都要努力学到。”这句话说明，学习雷锋同志更加需要（）

A.走出自我的狭隘天地

B.社会提供的客观条件

C.充分发挥主观能动性

D.排除外界的各种干扰