首页
财务会计
医药卫生
金融经济
考公考编
外语考试
学历提升
职称考试
建筑工程
IT考试
其他
登录
职称考试
下面有3 篇短文,每篇短文后有5 道题。请根据短文内容,为每题 确 定1 个最佳选项 。 “Salty” Rice Plant Boosts Harv...
下面有3 篇短文,每篇短文后有5 道题。请根据短文内容,为每题 确 定1 个最佳选项 。 “Salty” Rice Plant Boosts Harv...
admin
2020-12-24
35
问题
下面有3 篇短文,每篇短文后有5 道题。请根据短文内容,为每题 确 定1 个最佳选项 。
“Salty” Rice Plant Boosts Harvests
British scientists are breeding a new generation of rice plants that will be able to grow in soil containing salt water. Their work may enable abandoned farms to become productive once more.
Tim Flowers and Tony Yeo,from Sussex University’s School of Biological Sciences, have spent several years researching how crops,such as rice,could be made to grow in water that has become salty.
The pair have recently begun a three-year programme, funded by the Biotechnology and Biological Sciences Research Council, to establish which genes enable some plants to survive salty conditions. The aim is to breed this capability into crops, starting with rice.
It is estimated that each year more than 10m hectares of agricultural land are lost because salt gets into the soil and stunts (妨碍生长) plants. The problem is caused by several factors. In the tropics, mangroves (红树林)that create swamps (沼泽)and traditionally formed barriers to sea water have been cut down. In the Mediterranean, a series of droughts have caused the water table to drop, allowing sea water to seep (渗透)in. In Latin America,irrigation often causes problems when water is evaporated (蒸发)by the heat, leaving salt deposits behind.
Excess salt then enters the plants and prevents them functioning normally. Heavy concentrations of minerals in the plants stop them drawing up the water they need to survive.
To overcome these problems, Flowers and Yeo decided to breed rice plants that take in very little salt and store what they do absorb in cells that do not affect the plants5 growth. They have started to breed these characteristics into a new rice crop, but it will take about eight harvests before the resulting seeds are ready to be considered for commercial use.
Once the characteristics for surviving salty soil are known, Flowers and Yeo will try to breed the appropriate genes into all manners of crops and plants. Land that has been abandoned to nature will then be able to bloom again, providing much needed food in the poorer countries of the world.
Which of the following statements about Flowers and Yeo is true?
选项
A They are students at Sussex University.
B They are rice breeders.
C They are husband and wife.
D They are colleagues at an institution of higher learning.
答案
D
解析
转载请注明原文地址:https://ti.zuoweng.com/ti/8N9QKKKQ
相关试题推荐
下面的短文有5处空白,短文后有6个句子,其中5个取自短文,请根据短文内容将其分别放回原有位置,以恢复文章原貌。 ADoctorintheHou...
下面的短文有5处空白,短文后有6个句子,其中5个取自短文,请根据短文内容将其分别放回原有位置,以恢复文章原貌。 ADoctorintheHou...
下面的短文有5处空白,短文后有6个句子,其中5个取自短文,请根据短文内容将其分别放回原有位置,以恢复文章原貌。 ADoctorintheHou...
下面的短文有5处空白,短文后有6个句子,其中5个取自短文,请根据短文内容将其分别放回原有位置,以恢复文章原貌。 ADoctorintheHou...
下面的短文有5处空白,短文后有6个句子,其中5个取自短文,请根据短文内容将其分别放回原有位置,以恢复文章原貌。
下面的短文后有2项测试任务:(1)第23~26题要求从所给的6个选项中为第1~4段每段选择1个最佳标题;(2)第27~30题要求从所给的6...
下面的短文后有2项测试任务:(1)第23~26题要求从所给的6个选项中为第1~4段每段选择1个最佳标题;(2)第27~30题要求从所给的6...
下面的短文后有2项测试任务:(1)第23~26题要求从所给的6个选项中为第1~4段每段选择1个最佳标题;(2)第27~30题要求从所给的6...
下面的短文后有2项测试任务:(1)第23~26题要求从所给的6个选项中为第1~4段每段选择1个最佳标题;(2)第27~30题要求从所给的6...
下面的短文后有2项测试任务:(1)第23~26题要求从所给的6个选项中为第1~4段每段选择1个最佳标题;(2)第27~30题要求从所给的6...
随机试题
在进行多方案比选时,考察结构类型所涉及的因素不包括()。 A、方案的计算期是否
根据增值税法律制度的规定,下列关于增值税纳税义务发生时间的说法中,不正确的是(
根据泵站担负的任务不同,泵站枢纽布置一般有()等几种典型布置形式。
下列各种原因引起的剧痛,吗啡不适用于
重叠性奔马律常见于
1999-39.功能润肺清心,养胃生津的药是 A.天冬B.石斛C.生地D
A.牙颈 B.牙槽骨 C.牙根 D.牙冠 E.牙周膜对牙齿有支持、营养、感觉作用的为
以下不属于商业信用的是()。A.企业间的商品除销B.企业间的分期付款C.商品交易基础上发生的预付定金D.国库券
治疗骨折不可轻易切开复位内固定,最主要的原因A易损伤大血管,引起肢体坏死B损伤神经,引起肢体瘫痪C术中发生意外D影响骨折血运,导致延迟愈合或不愈合
国家防汛总指挥部的指挥长由()担任。A.国家副主席B.国务院副总理C.国务院副秘书长D.国务院水利行政主管部门负责人