首页
登录
职称英语
Ragwort was accidentally introduced to New Zealand in the late nineteenth centur
Ragwort was accidentally introduced to New Zealand in the late nineteenth centur
游客
2025-02-21
8
管理
问题
Ragwort was accidentally introduced to New Zealand in the late nineteenth century and, like so many invading foreign species, quickly became a pest. By the 1920s, the weed was rampant. What made matters worse was that its proliferation coincided with sweeping changes in agriculture and a massive shift from sheep farming to dairying. Ragwort contains a battery of toxic and resilient alkaloids: even honey made from its flowers contains the poison in dilute form. Livestock generally avoid grazing where ragwort is growing, but they will do so once it displaces grass and clover in their pasture. Though sheep can eat it for months before showing any signs of illness, if cattle eat it they sicken quickly, and fatality can even result. [br] The passage implies which of the following about the problems ragwort poses to dairy farmers?
选项
A、Milk produced by cows that eat ragwort causes illness in humans who drink it.
B、Ragwort can supplant the plants normally eaten by cattle.
C、Cattle, unlike sheep, are unable to differentiate between ragwort and healthy grazing.
答案
B
解析
Choice B is correct. The question asks about the problems ragwort poses to dairy farmers.
Choice A is incorrect: The passage does not mention the effect of ragwort consumption on the milk produced by cows.
Choice B is correct: The passage mentions that livestock will eat ragwort "once it displaces grass and clover in their pasture."
Choice C is incorrect: The passage claims that "livestock generally avoid grazing where ragwort is growing," but does not make a distinction between cattle and sheep.
转载请注明原文地址:https://tihaiku.com/zcyy/3966386.html
相关试题推荐
RagwortwasaccidentallyintroducedtoNewZealandinthelatenineteenthcentur
Femalelaborwasessentialtothegrowthofeighteenth-centuryEuropeantextile
Formostofthefirsthalfofthenineteenthcentury,scienceattheuniversity
Inthenineteenthcenturythe(i)______advancedmechanicalprintingtechniquesma
Intheearlytwentiethcentury,theideathatpianistsshouldbemusician-schola
Intheearlytwentiethcentury,theideathatpianistsshouldbemusician-schola
Aninnovationoftheeighteenth-centurycookbookwriterMaryColewasthatinhe
Nineteenth-centuryPlainsIndiansvalued______quitehighlyandexpectedtheirel
NewZealandandSpaincanaccuratelybedescribedas______becausetheyarediame
Thecrudeanimatedeffects(i)______projectedimagesfromseventeenth-centuryla
随机试题
Asimilarapproachcanbe______toinnovation.A、usedB、appliedC、triedD、employe
[originaltext]ThetraditionalAmericanfamilyusedtohaveaworkingfather
(1)TherecessioncamehometoPriceWaterhouse’sconsultancypracticeinthe
请计算二重积分,其中D是由圆周、x轴,y轴所围成的在第一象限内的闭区域
A1的点阵常数为0.4049mm,其晶胞中原子体积是0.04912m3,其结构为
在各种风管的制作安装定额中,已包括吊托支架制作安装的是( )。A、镀锌薄钢板通风
下列关于证券投资顾问后续职业培训的具体内容,说法正确的是()。 Ⅰ.重点掌握权
患者,男,32岁。恶寒发热2天,伴咽喉肿痛,口渴,舌苔薄黄。治疗除取主穴外,还应
有一个分数,分子与分母的和是100,如果分子加23、分母加32,新的分数约分后是
科学研究、教学单位需要使用麻醉药品和精神药品开展实验、教学活动的A.应当经所在地
最新回复
(
0
)