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
2024-04-09
6
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. Manyof 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、Their inability to circulate water.
B、Their increased sensitivity to heat.
C、Low reproductive rates.
D、Heavy pollution in the atmosphere.
答案
A
解析
细节题。根据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.可知水分无法循环造成了榆木的死亡。因此,正确答案是A。
转载请注明原文地址:https://tihaiku.com/zcyy/3547111.html
相关试题推荐
[originaltext]Ifyou’recarefulenough,you’llfindthatitiscommonnowad
[originaltext]InBritainthebiggestnumberofworkingforeignerscomesfro
[originaltext]Peter:(19)ThelawontaxisisveryinterestingandIknowinLon
[originaltext]OneofNewYork’smostbeautifulandvaluablebuildingsisin
[originaltext]OneofNewYork’smostbeautifulandvaluablebuildingsisin
[originaltext]Ababyspendsthefirstyearoflifelearningtolisten.(9)A
[originaltext]Ababyspendsthefirstyearoflifelearningtolisten.(9)A
[originaltext]Ababyspendsthefirstyearoflifelearningtolisten.(9)A
[originaltext]W:Hi,Scott,haveyouheardaboutDianarecently?M:No,Ihave
[originaltext]W:Hi,Scott,haveyouheardaboutDianarecently?M:No,Ihave
随机试题
InDowntownLosAngeles,youwillhavetheopportunitytoseetheMusicCente
FiveCommonMistakesinConversationandTheirSolutionsI.Notlis
逻辑变量X、Y进行逻辑“异或”(用⊕表示)运算的含义是:若X、Y取值相同(都为t
据说美国杜鲁门总统的成功与当学生的时候赢得英文教师布朗小姐的爱吻有关,这说明教师
甲状腺功能减退症的常见病因是A.肿瘤 B.甲状腺激素不敏感综合征 C.原发性
()各金融监管部门要按照职责分工,密切配合,切实做好金融消费者权益保护工作
下列( )不属于建设工程项目总进度目标论证的工作步骤。A、调查研究和收集资料
创新对于一个国家,或者一个企业很重要,机关工作人员在办事要讲规矩,作为一名公务员
2010年,银监会发布了《关于规范银信理财合作业务有关事项的通知》,要求融资类业
屋面防水工程中,关于涂膜防水层的说法错误的是()。A.胎体增强材料宜采用无
最新回复
(
0
)