首页
登录
职称英语
Tornadoes, whirlwinds, and watersprouts are rotating funnel cloud air masses
Tornadoes, whirlwinds, and watersprouts are rotating funnel cloud air masses
游客
2024-06-11
25
管理
问题
Tornadoes, whirlwinds, and watersprouts are rotating funnel cloud air masses of small diameter. They are differentiated by the intensity of their rotation and by the surfaces that they traverse. Though tornadoes and whirlwinds both travel over land masses, whirlwinds are atmospheric systems smaller than tornadoes. Watersprouts are tornadoes that form or pass over a water surface. A tornado is a powerful vortex or "twister" whose rotational speeds are estimated to be near 300 miles per hour. The first visible indication of tornado development is usually a funnel cloud. As this funnel dips earthward, it becomes darker because of the debris that is forced into its intensifying vortex. Some tornadoes give no visible warning Until their destruction strikes the unsuspecting victim. Tornadoes often occur in groups, and several twisters sometimes descend from the same cloud base. The forward speed of a tornado is normally 30 to 40 miles per hour. In the short time that it takes to pass, a tornado can cause fantastic destruction. There have been cases reported in which blades of straw were embeded in fence posts. [br] The author refers to straw embeded in fence posts in order to show ______.
选项
A、where tornadoes occur
B、who makes reports about tornadoes
C、when tornadoes take form
D、how tornadoes affect physical objects
答案
D
解析
这道题要求考生进行分析。前面文中提到龙卷风能造成巨大破坏,然后提到龙卷风使稻草嵌入栅栏柱上的例子,作者的意图当然是要强调龙卷风在物体上作用有多么强大,所以四个选项中很容易找出正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3629941.html
相关试题推荐
Tornadoes,whirlwinds,andwatersproutsarerotatingfunnelcloudairmasses
Tornadoes,whirlwinds,andwatersproutsarerotatingfunnelcloudairmasses
Tornadoes,whirlwinds,andwatersproutsarerotatingfunnelcloudairmasses
Tornadoes,whirlwinds,andwatersproutsarerotatingfunnelcloudairmasses
Tornadoes,whirlwinds,andwatersproutsarerotatingfunnelcloudairmasses
随机试题
Ahappymarriagehasbeenshowntolowertherisksofstress-relatedhealth
HowmanyhoursdoesNationalSavingBankofferthepart-timertodoperweek?[o
女,65岁。间断多关节疼痛20余年,双侧腕关节肿痛,僵硬,双手手指关节呈梭形肿胀
骨盆骨折最危险的并发症是( )A.盆腔内出血 B.膀胱破裂 C.尿道断裂
溴甲酚绿法测定血清白蛋白其显色原理是A.溴甲酚绿在pH4.2环境中与白蛋白形成黄
崩解剂的加入方法有三种,在崩解剂用量相同时,片剂崩解速率的顺序为下列A.内加法>
当断路器允许遮断故障次数少于()次时,变电站值班员应向管辖调度提出要求,停用该断
目前,我国新能源汽车推广的战略方向是在公共交通领域进行示范应用。截至2012年1
(2018年真题)某股份有限公司采用回购本公司股票方式减资,下列各项中,在回购本
A.脐疝 B.隐睾 C.腹股沟直疝 D.腹股沟斜疝 E.股疝经股管从卵圆
最新回复
(
0
)