首页
登录
职称英语
Like all animal species, plant species must spread their offspring to suitabl
Like all animal species, plant species must spread their offspring to suitabl
游客
2023-12-15
36
管理
问题
Like all animal species, plant species must spread their offspring to suitable areas
where they can grow and pass on their parent’s genes. Young animals generally spread by 【M1】______
walking or flying. Because plants don’t have that ability, they may somehow hitchhike. 【M2】______
Some plant seeds scatter by blowing in the wind or floating on water. Many other plant
species, though, trick an animal into carrying their seeds. How do they do? They enclose
them within a tasty fruit and advertise the fruit’ s ripeness by its color or smell. The hungry
animal collects and swallows the fruit, walks or flies off, but later spits out the seeds some-【M3】______
where far from its parent tree. Seeds can thereby be carried thousands of mi]es. It may 【M4】______
surprise you to learn that plant seeds can resist digestion. In fact, some seeds actually
require passage through an animal’ s body before they can grow. Wild strawberries offer a
good example of hitchhiking tactic. When strawberry seeds are still young and not yet 【M5】______
ready to be planted, the surrounding fruit is green, sour, and hard. When the seeds final 【M6】______
mature, the berries turn red, sweet, and tender. The change in the berries’ color serves as a
signal to birds which then eat the strawberries, fly off, and eventually spit out the seeds.
Naturally, strawberry plants doesn’t set out with a conscious intent of attracting birds only 【M7】______
when their seeds were ready to be dispersed away. Nor did birds set out with the intent of 【M8】______
planting strawberries. Rather, strawberry plants evolved through natural selection. The
sweeter and ruder the final strawberry, the more birds spread its ripe seeds; the greener and 【M9】______
more sour the young strawberry, the birds destroyed the seeds by eating berries before the 【M10】______
seeds were ready. [br] 【M2】
选项
答案
may改成must。
解析
情态动词语气不同,must强调必须,不得不,只能。
转载请注明原文地址:https://tihaiku.com/zcyy/3276627.html
相关试题推荐
ThebestknownAustraliananimalis______.A、bearB、kangarooC、hareD、elephantB
Likeallanimalspecies,plantspeciesmustspreadtheiroffspringtosuitabl
Likeallanimalspecies,plantspeciesmustspreadtheiroffspringtosuitabl
Likeallanimalspecies,plantspeciesmustspreadtheiroffspringtosuitabl
Likeallanimalspecies,plantspeciesmustspreadtheiroffspringtosuitabl
Likeallanimalspecies,plantspeciesmustspreadtheiroffspringtosuitabl
Likeallanimalspecies,plantspeciesmustspreadtheiroffspringtosuitabl
Likeallanimalspecies,plantspeciesmustspreadtheiroffspringtosuitabl
Vibrationsinthegroundareapoorlyunderstoodbutprobablywidespreadmeans
Vibrationsinthegroundareapoorlyunderstoodbutprobablywidespreadmeans
随机试题
Youmust______thefactsandshouldnotrunawayfromthetruth.A、lookB、sightC、
WhyPeopleworkWemayfullyrealizetheroleofworkin
Aconsiderableamountofworkinlinguisticshasgoneinlooking【S1】______a
(1)Theearliestcontroversiesabouttherelationshipbetweenphotographyand
下列不属于水利水电工程环境影响敏感区的是()。A.著名自然遗产 B.自然保
对某斜拉桥进行定期检查,并对桥梁进行技术状况评定。经检查后发现上部结构主梁为预应
开关场智能控制柜内()的接地端应与屏柜下方的接地铜排相连。(A)智能终端
关于国内货物招标,下列说法正确的有()A.投标报价是货物评标分析的主要因素
(2016年真题)甲公司2015年度取得销售货物收入1000万元,发生的与生
风湿性心瓣膜病并发感染性心内膜炎时,最支持感染性心内膜炎诊断的是( )。A.体
最新回复
(
0
)