首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Like all animal species, plant species must spread their offspring to suitable areas where they can grow and pass on their paren
Like all animal species, plant species must spread their offspring to suitable areas where they can grow and pass on their paren
admin
2010-05-14
60
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【M3】______
somewhere far from its parent tree.
Seeds can thereby be carried thousands of miles. 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 mm 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 reder 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.
【M7】
选项
答案
doesn’t改成didn’t。
解析
时态不一致,应使用过去时。
转载请注明原文地址:https://kaotiyun.com/show/YBlO777K
0
专业英语八级
相关试题推荐
Themomentumisbuildingaheadofnextmonth’sG8summitinScotlandwheretheleadersoftheworld’srichestnationswilldebat
AlongWashingtonState’srockycoastlineandinlandwaters,thered-and-whitepatrolboatsandhelicoptersoftheUnitedStates
"It’stoughtomakepredictions,especiallyaboutthefuture,"saidthatgreatbaseball-playingphilosopher,YogiBerra.Andyet
Asathrivingmidwesterncity,ChicagoisstillthebeatingheartofmuchofAmerica’sindustry.Butitsarteries—bothroadand
A、TodischargeahybridforcemadeupofAUandUN.B、TostationitstroopsintherestivewesternSudaneseregionofDarfur.C、
LincolnexpectedthatAmericawouldbecomeanationdoubtfulaboutitsheroesanditshistory.Inhisastonishingaddresstothe
A、Edithwasbelievedtobeanamiable,professional,andtherefore,suitablenominee.B、ThePresidentwasknowntobeunderpres
ThewayAmericansplanforretirementisabouttochange—again.AttheurgingofPresidentObama,theDepartmentofLaborisbac
ANewZealanderofEuropeandescentisknownasa
InBritain,popularnewspapersarealsocalled______.
随机试题
在考生文件夹下有一个数据库文件“samp3.accdb”,里面已经设计了表对象“tEmp”、窗体对象“fEmp”、宏对象“mEmp”和报表对象“rEmp”。同时,给出窗体对象“fEmp”的“加载”事件和“预览”及“打印”两个命令按钮的单击事件代码,请按以下
像一曲生命的挽歌,表现诗人对生命与死亡的深沉思索的诗是()
和易性
关于急性心包炎的临床表现,以下的哪一项不正确
奥美拉唑与下列叙述中哪项不符
关于分红寿险的设计,下列说法不正确的是( )。
甲公司为增值税一般纳税人,2017年2月涉及有关增值税的业务如下:(1)购入一栋办公楼,取得增值税专用发票注明的价款为8500万元,增值税税额为935万元,支付契税340万元。(2)委托新建厂房,购入工程物资取得增值税专用发票注明价款5
现行营业税政策规定,打井工程应( )
教师的道德修养,只有在()中才能得到不断充实、提高和完善。
Canwelearneverythingfromschool?Ateacher’sworkis______.
最新回复
(
0
)