首页
登录
职称英语
[originaltext] Good evening, I am Steve Johnson and I represent the American
[originaltext] Good evening, I am Steve Johnson and I represent the American
游客
2024-03-13
7
管理
问题
Good evening, I am Steve Johnson and I represent the American Elm Society. Today I’d like to introduce you to some of the problems faced by elm trees. Many of you are familiar with this huge tree. It’s found in many areas of US and Canada in cities and small towns. Well, as you may know, the American elm has been threatened by a dangerous disease. The disease is caused by a fungus, when that fungus infects the tree, it blocks the circulation of water inside the tree. As a result, the tree cells don’t receive water and without water, of course they can’t survive. The tree’s leaves become dry, fall off, and eventually the tree dies. You may be interested in how the disease is transmitted, well, a very small insect called elm bug beetle brings the fungus with it. The beetle uses the tree to reproduce itself. The female builds channels in the wood for the eggs, at the same time, it infects the tree with fungus. The worst thing is that the process seems unstoppable, because once the beetle leaves the infected tree it carries the fungus on its body and poisons a healthy tree. Of course, we are trying to fight the disease, in the past, infected trees were simply cut down. That method reduces the number of the infected trees but it never stop the disease. Now experts are trying to get to the root of the problem, they are working on ways to control the beetle that spreads the disease.
Now listen to the following recording and answer questions 16 to 18.
16. What is causing the death of the infected elm trees?
17. According to the speaker, what causes the healthy elm tree to become weak?
18. According to the speaker, how do experts hope to limit the spread of the disease in the future?
选项
A、By controlling the carriers of the disease.
B、By growing a stronger kind of the elm.
C、By watering infected elm trees.
D、By cutting down all infected elms.
答案
A
解析
细节题。根据Now experts are trying to get to the root of the problem,they are working on ways to control the beetle that spreads the disease.可知科学家们要从根源上控制传播疾病的虫子。因此,正确答案是A。
转载请注明原文地址:https://tihaiku.com/zcyy/3529704.html
相关试题推荐
[originaltext]So,nowweareintheroomwithnaiveart,producedintheUni
[originaltext]Goodevening,IamSteveJohnsonandIrepresenttheAmerican
[originaltext]Goodevening,IamSteveJohnsonandIrepresenttheAmerican
[originaltext]Goodevening,IamSteveJohnsonandIrepresenttheAmerican
[originaltext]SummermeansinternshipsforthousandsofAmericancollegestu
[originaltext]SummermeansinternshipsforthousandsofAmericancollegestu
[originaltext]SummermeansinternshipsforthousandsofAmericancollegestu
[originaltext]SummermeansinternshipsforthousandsofAmericancollegestu
[originaltext]W:Wu,doyouhavetimetotellmemoreaboutthemultimediateac
[originaltext]W:Wu,doyouhavetimetotellmemoreaboutthemultimediateac
随机试题
弹簧管压力表量程偏大时应( )。A.逆时针转动机芯 B.顺时针转动机芯
质量功能部署(QualityFunctionDeployment,QFD)将
肠道传染病是由于()引起的。A.别人与你接触传染 B.遗传 C.吃了不
继承和弘扬中华民族优良道德能够() A、提高民族自尊心和民族自信心,增强民族自
不属于教师道德品质范畴的是A.忠诚与节操 B.正直与自制 C.勤奋与求
A.手术治疗 B.持续牵引 C.推拿按摩 D.硬脊膜外封闭 E.绝对卧床
制定劳动力市场工资指导价位时,应( )。A.坚持市场取向 B.优先考虑企业
按照企业定价时侧重考虑因素的不同,可将定价方法分成()。A.成本导向定价法
征信服务中心收到商业银行重新报送的更正信息后,应当在()个工作日内对异议信息
《商业银行合规风险管理指引》所称的法律、规则和准则不包括()。A.银行业经营活
最新回复
(
0
)