首页
登录
职称英语
The idea of a fish being able to generate electricity strong enough to light
The idea of a fish being able to generate electricity strong enough to light
游客
2024-02-16
17
管理
问题
The idea of a fish being able to generate electricity strong enough to light lamp bulbs--or even to run a small electric motor--is almost unbelievable, but several kinds of fish are able to do this. Even more strangely, this curious power has been acquired in different ways by fish belonging to very different families.
Perhaps the best known are the electric rays, or torpedoes(电鳐), of which several kinds live in warm seas. They possess on each side of the head, behind the eyes, a large organ consisting of a number of hexagonal shaped cells rather like a honeycomb. The cells are filled with a jelly-like substance, and contain a series of flat electric plates. One side, the negative side, of each plate, is supplied with very fine nerves, connected with a main nerve coming from a special part of the brain. Current passes from the upper, positive side of the organ downwards, to the negative, lower side. Generally it is necessary to touch the fish in two places, completing the circuit, in order to receive a shock.
The strength of this shock depends on the size of the fish, but newly born ones only about 5 centime-tres across can be made to light the bulb of a pocket flashlight for a few moments, while a fully grown torpedo gives a shock capable of knocking a man down, and, if suitable wires are connected, will operate a small electric motor for several minutes.
Another famous example is the electric eel. This fish gives an even more powerful shock. The system is different from that of the torpedo in that the electric plates run longitudinally(纵向) and are supplied with nerves from the spinal(脊骨) cord. Consequently, the current passes along the fish from head to tail. The electric organs of these fish are really altered muscles and like all muscles are apt (likely) to tire, so they are not able to produce electricity for very long.
The power of producing electricity may serve these fish both for defence and attack. [br] The ideal title for this passage is______.
选项
A、The Eel
B、Torpedo
C、Electric Fish
D、Electric Power
答案
C
解析
文章的题目其实也就是对全文中心的归纳,整篇文章都在叙述有关能发电的特殊鱼类及其具体发电过程。A项“电鳗”当然不正确,全文说明的鱼类不只鳗鱼一类,且重点也不是鳗鱼而是其发电系统。B项电鳐也同样不正确,C项“发电的鱼”这显然与全文主题相切,D项“电力”这与全文巾题相切,D项“电力”这与全文中心差距太大,所以应选C项。
转载请注明原文地址:https://tihaiku.com/zcyy/3454676.html
相关试题推荐
[originaltext]EnglandbecameastrongholdoftheProtestantversionofChri
[originaltext]EnglandbecameastrongholdoftheProtestantversionofChri
[originaltext]EnglandbecameastrongholdoftheProtestantversionofChri
LanceArmstrongisthirty-threeyearsoldandisoneofthebestathletesin
LanceArmstrongisthirty-threeyearsoldandisoneofthebestathletesin
LanceArmstrongisthirty-threeyearsoldandisoneofthebestathletesin
LanceArmstrongisthirty-threeyearsoldandisoneofthebestathletesin
He______(本来可以选择另一种职业),butatthetime,hedidn’thaveenoughmoney.mighthave
Strongemotionsareusually【B1】______nonverbally:Bygestures,bodyposture,
Strongemotionsareusually【B1】______nonverbally:Bygestures,bodyposture,
随机试题
Whydoesthewomandoyoga?[br][originaltext]W:I’vedoneyogaforages,but
Thecompanyprovidesguidanceandhelpsothatyoucandecorateyourhouse______
汤显祖的戏剧代表作有哪些()。A.《紫萧记》 B.《紫钗记》 C.《长生殿》
下列关于地下连续墙钢筋骨架施工叙述错误的是()。A.骨架主筋的接长宜采用机
7岁男童,15天前咽痛,自服羟氨苄青霉素后好转,8天前低热,近4日右肩和左膝疼痛
人事测评小组的成员应包括()A:公司高层管理人员 B:招聘岗位资深任职人员
关于工序能力指标的用途,下列说法正确的有()。A.工序能力指标可以帮助企业确
下列关于Gamma的说法错误的有()。A.Gamma值较小时,意味着Del
随机区组设计的方差分析中,ν等于A.ν-ν B.ν-ν C.ν-ν D.ν
下列合同实施偏差处理措施中,属于合同措施的是()。A.采用新的高效率的施工方案
最新回复
(
0
)