Parasitic wasps lay their eggs directly into the eggs of various host insects in exactly the right numbers for any suitable size of host egg. If they laid too many eggs in a host egg, the developing wasp larvae would compete with each other to the death for nutrients and space. If too few eggs were laid, portions of the host egg would decay, killing the wasp larvae.
Which of the following conclusions can properly be drawn from the information above?
The size of the smallest host egg that a wasp could theoretically parasitize can be determined from the wasp's egg-laying behavior.
Host insects lack any effective defenses against the form of predation practiced by parasitic wasps.
Parasitic wasps learn from experience how many eggs to lay into the eggs of different host species.
Failure to lay enough eggs would lead to the death of the developing wasp larvae more quickly than would laying too many eggs.
Parasitic wasps use visual clues to calculate the size of a host egg.
原文的大意为,寄生蜂可以在不同大小的host egg上下准确数量的蛋。也就是host egg大,寄生蜂就多下点,host egg小,寄生蜂就少下点儿。A:host最小的蛋的大小可以从寄生蜂的下蛋行为推断出来,i.e.寄生蜂下的蛋的数量最少的那个,就是寄主最小的蛋。C:寄生蜂根据经验来决定下多少蛋,原文确实提到了寄生蜂面对不同的host egg下不同的蛋,但没有提到是不是learn from experience,万一是天生的呢?原文没提
有technically这种比较严谨的词通常成为答案
A为什么比C更合适呢?原文不是说的是小蛋的数量而不是小蛋的大小。
原文的大意为,寄生蜂可以在不同大小的host egg上下准确数量的蛋。也就是host egg大,寄生蜂就多下点,host egg小,寄生蜂就少下点儿。A:host最小的蛋的大小可以从寄生蜂的下蛋行为推断出来,i.e.寄生蜂下的蛋的数量最少的那个,就是寄主最小的蛋。C:寄生蜂根据经验来决定下多少蛋,原文确实提到了寄生蜂面对不同的host egg下不同的蛋,但没有提到是不是learn from experience,万一是天生的呢?原文没提
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d 没说过比较
PW将卵产在宿主的卵中(right number for suitable size)不同的size采取对应合适的数量;(因为)太多它们会打起来,太少会被反杀
结论
A、宿主卵的大小可以通过PW的行为来判断,CORRECT
B、宿主没办法阻挡PW,无关
C、PW由经验具体问题具体分析产卵,题目中NM经验
D、太少的情况比太多多,NM
E、PW用视觉判断宿主的卵,不一定,NM
must be true
A. 通过wasp的behavior能够确定 能产蛋的hostage的最小size,正确
(小于这个size的不产蛋,大于这个size的有蛋,故这个范围值可以确定)
A:host最小的蛋的大小可以从寄生蜂的下蛋行为推断出来,i.e.寄生蜂下的蛋的数量最少的那个,就是寄主最小的蛋
E:visual clues是新訊息,沒提到
题干:in exactly the right numbers for any suitable size of host egg
错选C。读懂题干后就知道C是无关选项了。题干强调的是黄蜂会根据宿主的大小而产卵,而不是根据不同宿主产卵
cr
错第三次
推论题必须保证一定正确。
c中Parasitic wasps learn from experience 是不是从经验来学习,文中没说
d中怎样会导致幼虫死的更快,文中更没有说,也无从推论
The size of the smallest host egg that a wasp could theoretically parasitize can be determined from the wasp's egg-laying behavior.
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“Parasitic wasps lay their eggs directly into the eggs of various host insects in (exactly the right numbers )for any suitable size of host egg.”
Parasitic wasps lay their eggs directly into the eggs of various host insects in exactly the right numbers for any suitable size of host egg.
w把蛋直接下在宿主蛋里,以对宿主蛋的尺寸来说刚好正确的数量。
in number,可以做状语,表示在数量上维持某种状态,用某种数量来做某事
We were eight in number (= there were eight of us). 我们有八个人。
Nurses are leaving the profession in increasing numbers. 越来越多的护士退出这一职业。
lay eggs in the right numbers
right numbers for sth,对某物而言正确的数量,for表示动作/状态的对象,如:have admiration for sb,对某人的敬仰
If too few eggs were laid, portions of the host egg would decay, killing the wasp larvae.如果蛋下得太少,宿主蛋的一部分会腐烂,杀死w的幼虫。
这里应该是没被下蛋的部分会腐烂,杀死已经孵化的幼虫,而不是下了蛋的地方会腐烂,杀死w的卵。
The size of the smallest host egg that a wasp could theoretically parasitize can be determined from the wasp's egg-laying behavior.最小的宿主蛋的尺寸可以由w的下蛋行为来确定。
yes,w根据宿主蛋的尺寸决定要下多少蛋在里面。
for any suitable size of host egg
又错了,mark
c中Parasitic wasps learn from experience 是不是从经验来学习,文中没说
d中怎样会导致幼虫死的更快,文中更没有说,也无从推论
推论题必须保证一定正确。
The size of the smallest host egg that a wasp could theoretically parasitize can be determined from the wasp's egg-laying behavior.
归纳题。 drawn from the passage. 归纳题要从原文的信息中归纳出必然情况,若出现原文没有谈及的新信息、进行新的比较、出现新的最高级修饰词,都属于可排除的错误选项。
A比C严谨
我的思路:这道题属于特殊问法里面的演绎推理类型,此题解题关键在于基于文本内容找选项,即选项应该是对文段部分或全部内容的转述或整合。
选项A宿主卵的大小决定了黄蜂的产卵行为。正确
选项B 文段没有说宿主昆虫没有任何对抗寄生行为的措施。跳出讨论范畴
选项C 文段没有说黄蜂产出适当个数的卵是通过经验习得的。跳出讨论范畴
选项D 文段没有出现幼虫死亡速度加快这一比较关系。
选项E visual clues跳出讨论范畴
If too few eggs were laid,此处egg是幼虫的egg不是宿主的
看了楼下的解析 A:host最小的蛋的大小可以从寄生蜂的下蛋行为推断出来,i.e.寄生蜂下的蛋的数量最少的那个,就是寄主最小的蛋
这个比较认同
为什么选A? Host 的egg的大小,和寄生卵的生产者wasps有什么关系?