Each year red-winged blackbirds stop in a certain region of Midland Province on their spring and fall migrations. In the fall, they eat a significant portion of the province's sunflower crop. This year Midland farmers sought permits to set out small amounts of poisoned rice during the blackbirds' spring stop in order to reduce the fall blackbird population. Some residents voiced concern that the rice could threaten certain species of rare migratory birds. Nevertheless, the wildlife agency approved the permits.
Which of the following, if true, most helps to justify the wildlife agency's approval of the permits, given the concerns voiced by some residents?
In the region where the red-winged blackbirds stop, they are the first birds to be present in the spring.
The poison that farmers want to use does not kill birds but rather makes them incapable of producing viable eggs.
Since rice is not raised in Midland Province, few species of birds native to the province normally eat rice.
Without the permit, any farmers shown to have set out poison for the blackbirds would be heavily fined.
The poison that farmers got approval to use has no taste or smell that would make it detectable by birds.
以后看到不是那么完美的,得先保留,只能先排除最离谱最无关的。
想清楚目标答案再进选项才不容易出错
我也以为很少迁徙的鸟等于natvie bird错选了B登录 或 注册 后可以参加讨论
B: 毒药让鸟不能下蛋,也会让其他濒危的候鸟面临危险。 -> 选B的错误原因,是简单地把 threaten 和 杀死 联系起来。看到“仅仅不下蛋而不杀死”,就觉得这个可以justify了。但是不下蛋和杀死几乎有一样的作用。解决办法:选好以后,反过来再验证一下。看着像的,一般都是坑。
C:担忧的是会不会威胁到其他迁徙的的后年,和本地鸟没关系
native本地的
看清单词!
A: red-winged 和其他的候鸟共同落脚的地方,red-winged先落脚,说明他们可以把饲料吃完,不影响到后面的。正确
B: 毒药让鸟不能下蛋,也会让其他濒危的候鸟面临危险。 -> 选B的错误原因,是简单地把 threaten 和 杀死 联系起来。看到“仅仅不下蛋而不杀死”,就觉得这个可以justify了。但是不下蛋和杀死几乎有一样的作用。解决办法:选好以后,反过来再验证一下。看着像的,一般都是坑。
C. 注意理清句子结构,说的是birds native to province,无关
【不要钻牛角尖,不要剑走偏锋】
C. 注意,说的是birds native to province,无关
逻辑链分析:
投放有毒米饭1→迁移的黑鸟会减少2→同样迁移的稀有鸟也会减少3
隐含假设:迁移的鸟会吃到有毒米饭
A说明黑鸟最先达到,因此有毒米饭会被黑鸟吃掉,也就不会被后到达的稀有鸟吃到。
---by ruqi
每年秋天blackbird路过村庄都会破坏粮食,农民准备用毒药杀死一部分鸟保护庄稼。尽管一些人担心农药会杀死另外一些候鸟,村里最后还是批准用药。问explain
choice a, 在这种blackbird每年春天落脚的地方,这些鸟是第一批到达的候鸟。correct,说明这些鸟可以在其他候鸟来之前把毒药给吃完。
choice c, 因为大米不是本地生产的,很少有本地的鸟会去吃米。irrelevant,讨论的scope是会不会对其他候鸟造成伤害,和本地鸟无关
题目中说是在spring stop中放毒米,然后减少fall的population,我也没看到然后排了A登录 或 注册 后可以参加讨论
---by ruqi
每年秋天blackbird路过村庄都会破坏粮食,农民准备用毒药杀死一部分鸟保护庄稼。尽管一些人担心农药会杀死另外一些候鸟,村里最后还是批准用药。问explain
choice a, 在这种blackbird每年春天落脚的地方,这些鸟是第一批到达的候鸟。correct,说明这些鸟可以在其他候鸟来之前把毒药给吃完。
choice c, 因为大米不是本地生产的,很少有本地的鸟会去吃米。irrelevant,讨论的scope是会不会对其他候鸟造成伤害,和本地鸟无关