首页
登录
职称英语
Whet does the professor mainly discuss? [br] [originaltext] A number of ins
Whet does the professor mainly discuss? [br] [originaltext] A number of ins
游客
2024-10-28
25
管理
问题
Whet does the professor mainly discuss? [br]
A number of insects rely on leaping or jumping as a way of escaping from enemies. Grasshoppers probably have the most remarkable jumping ability of all these insects. If we think of it in human terms, a grasshopper’s high jump is like a human jumping over a five story building. Imagine that a person jumping over a five story building. Welt, we’ll take a look at the structure of grasshopper’s leg to see why it’s able to jump so well, but first I wanna talk about the sensory organ that tells grasshoppers when to jump in the first place. En, OK, a grasshopper has two sensory organs located at the end of its abdomen. Whenever these organs sense of change in air pressure which might be produced by an enemy approaching, an impulse is transmitted to the legs, this first impulse deactivates the nerves that control normal working and sets the grasshopper’s jumping muscles into a sort of pre-jumping position. Now at this point, if the sensory organs don’t detect additional air pressure changes, the jumping muscles relax and a grasshopper goes back to its normal walking. But if the organs continue to send danger, another set of impulses put the jumping muscles in motion. The distance of the jumping is determined by just how many impulses are transmitted in the second set, the more impulses the longer the jump. OK now let’s see why the grasshopper can jump so far.
选项
A、To correct a common misunderstanding about grasshoppers.
B、To help explain how well’ grasshoppers can jump.
C、To compare the size of grasshopper with that of other insects.
D、To show how quickly grasshoppers respond to danger.
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3820640.html
相关试题推荐
WhatisJack’sinitialreactiontoMaggie’sconcern?[br][originaltext]W:Hi,
WhatisJack’sinitialreactiontoMaggie’sconcern?[originaltext]W:Hi,Jack,
TheEnglish-Chinesedictionaryofmedical______compiledbyProfessorSmithwas
Yesterday’sstrikecausedcompleteconfusionfor______.[br][originaltext]
Yesterday’sstrikecausedcompleteconfusionfor______.[br][originaltext]
Whatisthepurposeofthisclassdiscussion?[br][originaltext]S:Let’stalk
Whatisthepurposeofthisclassdiscussion?[originaltext]S:Let’stalkabout
Whatisthemaintopicoftheconversation?[br][originaltext]M:You’reprobab
Whatisthewoman’smainpurposeinthisconversation?[br][originaltext]W:Dr
Whatisthewoman’smainpurposeinthisconversation?[originaltext]W:Dr.Newb
随机试题
TheearthquakestrokeallthefollowingplacesEXCEPT[originaltext]
WelcometoVirginiaPleasecometofeelthewarmtho
支部党员人数一般不应超过()人。A.30 B.10 C.15
旅客运输与货物运输有什么主要区别?
______是指人们按照预定目的,有意识地调节自己的行动,克服困难的心理过程。
《雾凇》 ?1.题目:《雾凇》 ?2.内容: 三九严寒,大地冰封。松花江畔
A.反相离子对色谱B.反相色谱C.正相色谱D.离子交换色谱E.离子抑制色谱以C柱
患者女性,42岁。因阴道分泌物增多伴外阴奇痒1周就诊。既往糖尿病2年,近1年前4
小明是高一学生,家里是低保户。根据《关于进一步做好城乡特殊困难未成年人教育救助工
下列各项中,属于民法典合同编调整范围的是()。A.陈某与张某签订的收养协议
最新回复
(
0
)