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
39
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、They detect nerve impulses transmitted to a grasshopper’s legs.
B、They sense how far a grasshopper has jumped.
C、They detect changes in air pressure.
D、They help a grasshopper find food.
答案
C
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3820641.html
相关试题推荐
WhatisJack’sinitialreactiontoMaggie’sconcern?[originaltext]W:Hi,Jack,
TheEnglish-Chinesedictionaryofmedical______compiledbyProfessorSmithwas
Yesterday’sstrikecausedcompleteconfusionfor______.[originaltext]More
ThecasualtiesfortherivalMuslinmilitiaswere______.[br][originaltext]
ThecasualtiesfortherivalMuslinmilitiaswere______.[originaltext]tan
Whatisthepurposeofthisclassdiscussion?[br][originaltext]S:Let’stalk
Whatisthepurposeofthisclassdiscussion?[originaltext]S:Let’stalkabout
Whatisthemaintopicoftheconversation?[br][originaltext]M:You’reprobab
Whatisthemaintopicoftheconversation?[br][originaltext]M:You’reprobab
Whatisthewoman’smainpurposeinthisconversation?[br][originaltext]W:Dr
随机试题
Asweknow,physics________thescienceofenergy.A、wasB、wereC、isD、areC本题考
Haveyoueverbeeninasituation______youknowtheotherpersonisrightyety
Moneycanbuyhappiness,butonlyifyouspenditonsomeoneelse,researche
[originaltext]M:Hi,everyone,todaywe’regoingtotalkaboutBritishpolitene
学费占年生均教育培养成本的比例和标准由财政部制定。()
1985年颁布的《旅行社管理暂行条例》,标志着我国旅行社的管理进入()轨道。A.
A.13 B.7 C.0 D.-6
左图为给定的立体图,从任意角度剖开,右边哪一项不可能是它的截面图? A.如上图
某高速公路上下行分离式隧道,洞口间距40m,左线长3216m,右线长3100m,
患者男,40岁。反复上腹疼痛5年余,常放射至后背、两胁部,平卧时加重,弯腰可减轻
最新回复
(
0
)