首页
登录
职称英语
The nuclear polyhedrosis virus helps control gypsy moth populations by killing t
The nuclear polyhedrosis virus helps control gypsy moth populations by killing t
游客
2024-01-13
30
管理
问题
The nuclear polyhedrosis virus helps control gypsy moth populations by killing the moth’s larvae. The virus is always present in the larvae, but only every sixth or seventh year does the virus seriously decimate the number of larvae, thereby drastically setting back the gypsy moth population. Scientists believe that the virus, ordinarily latent, is triggered only when the larvae experience biological stress. If the scientists mentioned above are correct, it can be inferred that the decimation of gypsy moth larvae populations by the nuclear polyhedrosis virus would be most likely to be triggered by which of the following conditions?
选项
A、A shift from drought conditions to normal precipitation in areas infested by gypsy moths.
B、The escalating stress of defoliation sustained by trees attacked by gypsy moths for the second consecutive year.
C、Predation on larvae of all kinds by parasitic wasps and flies.
D、Starvation of the gypsy moth larvae as a result of overpopulation.
E、Spraying of areas infested by gypsy moths with laboratory-raised nuclear polyhedrosis virus.
答案
D
解析
本题重点有两个:(1)明晰问题目的,当问题目的较长时尤应如此;(2)读题重点应放在段落最后一句话“only when the larvae experience biological stress”。(D)中的“overpopulation”与“biologicalstress”相吻合,所以(D)正确;(A)起到了驳斥作用;(B)中的“trees”为新概念;(C)中的“all kinds”把范围扩大化了;(E)也与段落推理无关。
转载请注明原文地址:https://tihaiku.com/zcyy/3358352.html
相关试题推荐
I’msorry.I______atyoutheotherday.Iwasabitoutofcontrol.A、shouldn’ts
Throughoutthepastcenturyhumanitydideverythinginitspowertocontrol
Throughoutthepastcenturyhumanitydideverythinginitspowertocontrol
Thebigfirelastedaslongas24hours______itwasbroughtundercontrol.A、afte
ThenuclearpoweremergencyataJapaneseatomicpowerplantlastMarchcoul
ThenuclearpoweremergencyataJapaneseatomicpowerplantlastMarchcoul
Themerefact________mostpeoplebelieveanuclearwarwouldbemaddoesnotmea
Thetimehascome________wecanmakeextensiveuseofnuclearenergy.A、whenB、wh
Whilethereisnoblueprintfortransformingalargelygovernment-controlledeco
Alcohol-controladvocatesarguethattelevisionadvertisingplaysalargerolei
随机试题
[audioFiles]audio_eusm_j01_036(20099)[/audioFiles]A、Theyshouldwaitpatiently.
中国民族自古以来从不把人看作高于一切,在哲学文艺方面的表现都反映出人在自然界中与万物占着一个比例较为恰当的地位,而非绝对统治万物的主宰。因此我们的苦闷,
传染病能在人与人.动物与动物或者人与动物之间相互传播,具有流行性和_______
假定学生Students和教师Teachers关系模式如下所示: Studen
国家食品药品监督管理局负责对药品的A研究、生产、使用进行行政监督和技术监督 B
其他人员应在()等待,不得进入主控室及设备场区。检修区$;$非设备区
A. B. C. D.
传统中国的日常生活世界总是曲里拐弯,充满细节、血肉,剪不断,理还乱。在是否宜居方
A公司只生产销售B产品,其销售量预测相关资料如下表所示: 要求:
属于机坪供电对象的是( )。A.顺闪灯光系统 B.调光器 C.泊位
最新回复
(
0
)