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
Spiders Spiders can be distinguished from other Arachnids because the prosoma (combined head and thorax) is only separated f
Spiders Spiders can be distinguished from other Arachnids because the prosoma (combined head and thorax) is only separated f
admin
2013-06-17
57
问题
Spiders
Spiders can be distinguished from other Arachnids because the prosoma (combined head and thorax) is only separated from the opisthosoma (abdomen) by a narrow waist, in other Arachnids the whole body appears to be much more of a single unit. All spiders produce silk, but only some construct webs to catch their homes and to protect their eggs.
All spiders possess poison glands but very few of them are dangerous to humans, of the 600+ species in Britain only 12 (at least one of these is a recent human assisted colonist) are strong enough to pierce the human skin, and apart from allergies, none are more dangerous than a common wasp. Most spiders have 8 eyes (though some have 6, 4, 2 or 0), as well as 8 legs. (by the way if you count the claws as separate leg section [which you shouldn’t really] then their legs have 8 parts as well [coxa, trochanter, femur, patella, tibia, tarsus, metatarus, claws]) There are more than 32000 known species of spider in the world. No human being has ever been officially recorder as having died as the result of a ’tarantula’ bite.
All spiders are carnivorous and feed only on liquids, i.e. their preys natural juices and the breakdown products of external digestion (meaning they spit, exude or inject digestive juices onto/into their prey and suck up the resulting soup). So why not invite some to your next social do?
What’s In a Name
The word ’Arachnida’ comes from the Greek word ’Arachne’ who was the daughter of Idmon of Colophon in Lydia, a dyer by trade. Arachne herself was a weaver, the best in all the known world. However in a foolish moment she challenged Athena, the daughter of Zeus and goddess of, among other things, waving to a weaving competition. Arachne wove so perfect a cloth that she tore it to shreds. Arachne became depressed after this and in the end she hung herself. Athena stirred to remorse at the knowledge of what her anger had wrought turned the rope Arachne had used to hang herself into a web and Arachne herself into a spider so that the beauty of her spinning should not be lost to the world ever again.
The Great Household Spider Safari
There are just over six hundred different sorts of spider in the British Isles. But of these only ’a handful are commonly found in houses. At the front of the head are a pair of what appear to be small legs. These are called palps and are used to guide food to the spider’s mouth. The front of the head also has a group of six or eight eyes. On the underside of the body at the rear, are four or six small conical bumps or cylinders. There are the spinnerets from which the spider produces the silk to make its webs.
Telling male and female spiders apart is easily done by looking at their palps. Males have swollen ends to their palps which makes them look as if they are wearing boxing gloves, these are often strange shapes if looked at with a hand lens. Females have normal looking palps that are not swollen at the ends.
The largest spider is the Goliath spider, the female of which grows to reach a leg span of ten inches, The largest spider in Britain is the Cardinal spider which is a close cousin of Tim Tegenaria. Females can achieve a leg span of four and a half inches. It is known as the Cardinal spider as it was common in Hampton Court when Cardinal Wolsey lived there. The sight of these long legged spiders wandering around the palace at night used to frighten him. So far 32000 different kinds of spider have been discovered from all over the world. Britain has 630 different kinds of spider of which 250 are tiny Money spiders. The smallest of which has a body less than one millimeter long.
Spiders often kill humans in Britain when they pierce human skin.
选项
A、Y
B、N
C、NG
答案
B
解析
原文中第二段首句中写到,“of the 600+ spiders in Britain only l2 are strong enough to pierce the human skin”,因此并不是命题中说的当它们刺进入的皮肤会经常杀死人。
转载请注明原文地址:https://kaotiyun.com/show/5WM7777K
0
大学英语四级
相关试题推荐
Formanypeopletoday,readingisnolongerrelaxation.Italsomeanswork.Tokeepuptheirworktheymustreadletters,report
BetterHalvesJerryandEileenSpinellimet,quiteliterally,overwriting.Atthetime,theyworkedforthesamecompanybu
BetterHalvesJerryandEileenSpinellimet,quiteliterally,overwriting.Atthetime,theyworkedforthesamecompanybu
ThenativepeopleofNorthandSouthAmericaweregiventhename"Indians"bythe【B1】______ChristopherColumbus.Hethoughthe
A、He’stakingabreakfromstudying.B、Hehasalreadyfinishedstudying,C、Hewasassignedtowatchaprogrambyhisprofessor.
Whatcausesmentopursuetopmanagement?Psychologistsoncebelievedthatthe【C1】______thatcausedmentostrivetoattainhi
Thestudyofsignlanguageisthoughttobe______.MosteducatorsobjectedtoStokoe’sideabecausetheythought______.
A、Husbandandwife.B、Dentistandpatient.C、Lawyerandclient.D、Teacherandstudent.B男士问对方感觉哪儿不舒服;女士述说自己下腭上的一颗牙齿松动,而且疼得整夜都睡不着
A、Takesomechangeonhim.B、Changehisideas.C、Changeclothes.D、Exchangehispositionwiththewoman.C题目询问男士将先做什么。关键是听到女士说“去
A、TherestauranthasbeenavailablesinceChristmas.B、Shepromisestherewillbeatableavailableat7:00C、Sheisnotsurewh
随机试题
工业企业为生产一定种类一定数量的产品所支出的各种生产费用的总和,称为【】
在短期中,下面哪一点是正确的?
制备胶剂时,为降低胶块黏度,便于切胶,常加入
HGPRT参与的反应是
根据《民法通则》第一百三十四条的规定,承担民事责任的方式主要有()。
甲将自己所有的房屋出租给乙居住,双方口头约定租期为两年,但未签订书面合同。乙居住一年之后,甲因故决定收回房屋给家人居住,遂提前一个月通知乙搬出,则()。
商业银行利用资产负债表或某些具有收益负相关性质的业务组合本身所具有的对冲特性进行风险对冲是()。
关于HAMA说法正确的是()。
课程评价
一国国际收入顺差会使得()。
最新回复
(
0
)