首页
登录
职称英语
[originaltext] We’ve now discussed how most snakes move. but there are some
[originaltext] We’ve now discussed how most snakes move. but there are some
游客
2024-02-07
51
管理
问题
We’ve now discussed how most snakes move. but there are some exceptions. One is the snake called the American side-winder. From its name, you can probably guess that it moves sideways rather than in a straight line. This is because it lives in the desert where the sand slips and slides. With nothing firm to push against, the side-winder has had to adapt its way of movement to the shifting sand. It pushes against the sand with the entire side of its body, and then move sideways. Think about how a skier climbs a slope on skies. The skier places the skies at an angle of 90 degrees to the direction of movement. The skier then moves each ski by taking a step to the side up the slope. The side-winder snake moves in much the same manner. It lays its body at about 60-degree angle to the direction in which it wants to go. By doing this, the snake has more sand to push against. Then it points its head in the direction it wants to go and leaps to a parallel spot. If you see the tracks left by the side-winder in loose sand, you’ll see a series of paralleled lines. An advantage gained from this method of moving may be that the snake’s body is kept cooler by breaking off contact with the hot sand during its leaps.
22. What is the main topic of the passage?
23. Why does the side-winder move the way it does?
24. What do the side-winder’s tracks look like?
25. What may be a special advantage of the side-winder’s way of moving?
选项
A、Because it has its name as side-winder.
B、Because it lives in the slippery sandy desert.
C、Because its body is very smooth.
D、Because it does not adapt to the environment.
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3430714.html
相关试题推荐
[originaltext]W:LookatthissuperbpaintingIboughttoday.Itonlycosts£1
[originaltext]W:LookatthissuperbpaintingIboughttoday.Itonlycosts£1
[originaltext]W:LookatthissuperbpaintingIboughttoday.Itonlycosts£1
[originaltext]W:LookatthissuperbpaintingIboughttoday.Itonlycosts£1
[originaltext]W:LookatthissuperbpaintingIboughttoday.Itonlycosts£1
[originaltext]Preventingchildhoodinjurieswouldseematoughtask.Butth
[originaltext]Preventingchildhoodinjurieswouldseematoughtask.Butth
[originaltext]Duringthe19thcentury,women’seducationwasnotconsidered
[originaltext]SurveysofAmericanteenagersfindthatabouthalfofthemdo
[originaltext]SurveysofAmericanteenagersfindthatabouthalfofthemdo
随机试题
SevereandincreasingnumerouscriticsarepointingtodeficienciesintheBriti
[audioFiles]2021m5x/audio_ve01005j_ezflisteningxa_0080_202105[/audioFiles]
当代马克思主义新闻观的核心是()A.坚持党性原则 B.坚持正确舆论导向 C.
对室性心动过速描述错误的是A.QRS波增宽 B.可出现融合波 C.左后分支室
作为教师道德主体一分子的教师个人,他的主体地位和主体性并不是由教师个人来确定的,
血栓闭塞性脉管炎营养障碍期最主要的临床表现是A.肢端发黑、干性坏疽 B.间歇性
天柱穴所属的经脉是( )。A.足少阳胆经 B.手少阳三焦经 C.手太阳小肠
一住店客人未付房钱即想离开旅馆去车站。旅馆服务员揪住他不让走,并打报警电话。客人
下列有关注册会计师在对进一步审计程序设计时采取的总体审计方案的说法中,正确的是(
诊断甲亢的首选实验室检查( )。A.FT3?、FT4 B.TT3?、TT4
最新回复
(
0
)