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
138
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.
All the silk produced by spiders construct webs to catch their food,
选项
A、Y
B、N
C、NG
答案
B
解析
当出现all这种过于绝对的词语时,考生应该引起注意。一般这样的命题多数是不正确的。首段中有句话:“All spiders produce silk,but only some construct webs to catch their food"命题中all的说法过于绝对。
转载请注明原文地址:https://kaotiyun.com/show/uWM7777K
0
大学英语四级
相关试题推荐
Formanypeopletoday,readingisnolongerrelaxation.Italsomeanswork.Tokeepuptheirworktheymustreadletters,report
CustomsofficersataLondonairportyesterdayfound500,000poundsworthofdrugswhichwerebeingsmuggled(走私)intoBritainin
BetterHalvesJerryandEileenSpinellimet,quiteliterally,overwriting.Atthetime,theyworkedforthesamecompanybu
Whenhelefthisparentshepromisedthemthathewould______(尽量多写家信).
Spaceisfilledwithradiantenergyandbeyondearth’satmospherethisenergyflowsteadilyandintenselyfromthesun.Anabund
A、Aclasspresentation.B、Atelevisionprogram.C、Visitingaclosefiend.D、Studyingforatest.D
A、Heisfeelingcoldnow.B、Heisintheofficenow.C、Hemayworktoohard.D、Hehasapainonhisleg.C对话中男士说他感觉很不好,颈部疼痛并且无法睡
FreeSchoolMealsMillionsofAmericanschoolchildrenarereceivingfreeorlow-costmealsforthefirsttimeastheirparen
A、Thetwospeakersareatalossaboutwhattodo.B、Themanisworriedabouthisfuture.C、Thetwospeakersareseniorsatcoll
A、Hehasneverbeentothelaboratory.B、Hewantstostopandaskfordirections.C、Thewomanwon’tbelate.D、Theprograminth
随机试题
女性,50岁,摔伤两天,左髋部痛。检查:左下肢短缩,外旋500°畸形。全身重要器官无异常表现。最可能诊断
言谈不多,语速较慢,善于克制,注重稳定,具备这种特征的人所属气质类型一般为()。
脑白金——吆喝起中国礼品市场在中国,如果谁提到“今年过节不收礼”,随便一个人都能跟你过不去地说“收礼只收脑白金”。脑白金已经成为中国礼品市场的第一代表。睡眠问题一直是困扰中老年人的难题,因失眠而睡眠不足的人比比皆是。有资料统计,国内至
对求职者的信息掌握较全面,招聘成功率高的员工招聘方式是()
注意可以分为()。
2003年1月22日,公安部发布了加强公安机关内部管理的“五条禁令”。禁令规定,严禁携带枪支饮酒,违者予以( ),造成严重后果的,予以( )。
某年某市“两会”前夕,当地一家媒体就“两会”焦点话题,分别对外来务工人员和城市居民进行了调查,位列前三的分别是:调查结果显示,不同对象所关注的热点不同。这表明()。
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性。
Shanghaiisabigcity.Itis______thesoutheastofChina.
中国的现代化建设必须从中国的实际出发。无论是革命还是经济建设,都要注意学习国外经验。但是照搬照抄别国经验、别国模式,我们不能取得成功。中国的事情要按中国的情况来办,要依靠中国人自己的力量来办。无论过去、现在和将来。独立自主、自力更生都是我们的立足点。任何国
最新回复
(
0
)