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
41
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、Straight lines.
B、Curving lines.
C、Paralleled lines.
D、Crossing lines.
答案
C
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3430715.html
相关试题推荐
[originaltext]Apopularboyband,theBackstreetBoysisprobablythemost
[originaltext]IfyouwanttoescapefortheValentine’sDayweekendbutdon
[originaltext]Somepessimisticexpertsfeelthattheautomobileisdoomed.
[originaltext]W:Ihaven’tseenyouhereforacoupleofweeks.Haveyoustope
[originaltext]W:Ihaven’tseenyouhereforacoupleofweeks.Haveyoustope
[originaltext]W:Ihaven’tseenyouhereforacoupleofweeks.Haveyoustope
[originaltext]W:I’vebeenreadingaboutanewsnackfood.It’smadefromfish.
[originaltext]W:I’vebeenreadingaboutanewsnackfood.It’smadefromfish.
[originaltext]M:What’sLauradoingheretoday?Ithoughtshewassupposedtob
[originaltext]M:What’sLauradoingheretoday?Ithoughtshewassupposedtob
随机试题
Itwasoncethoughtthatairpollutionaffectedonlytheareaimmediatelyar
用赛宾公式计算某大厅的混响时间时,用不到以下哪个参数?()A.大厅的体积
HBV感染的主要标志是_______。
工程量清单中关于项目特征描述的重要意义在于()。A.项目特征是区分具体清单项目的
在制定退休规划时,应适当多估计支出,少估计收入,预估寿命时最好以当地人均寿命为基
( )特别适合用于各种复杂、不规则部位的防水。 A、防水涂料 B、防水卷
房源的动态性主要包括()等方面。A.物业使用年限的更改 B.物业使用范围的
以下关于医疗机构使用麻醉药品和第一类精神药品的说法,错误的是A.医疗机构需要使用
只存在于脱氧核糖核酸中的碱基是A.腺嘌呤 B.鸟嘌呤 C.胞嘧啶 D.尿嘧
下列各项不属于实施小额信贷组织机构的是( )。A.中国人民银行 B.信贷联盟
最新回复
(
0
)