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
24
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] According to the passage, which of the following behaviors is frequently characteristic of funnel clouds?
选项
A、Descending from different cloud bases.
B、Occurring in isolated areas.
C、Lasting a long time.
D、Occurring in groups.
答案
D
解析
这道题只要考生注意到文中"Tornadoes often occur in groups,...”而其他三个选项是文中没有提到的。
转载请注明原文地址:https://tihaiku.com/zcyy/3629939.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
[audioFiles]audio_etoefz_031(20051)[/audioFiles]A、Hedidn’tenjoythegamebeca
[originaltext]W:Wherecanwegetataxi?M:Rightoutside.Butmostpeopledo
[originaltext](32)Yourassignmentsthistermwillbetowritetwomajorres
Colorsaresometimescalledhot,cold,orneutral(中性的).Redandyellowares
牙龈肿胀最常见于()。A.急性粒细胞白血病 B.急性单核细胞白血病 C.急
PS系列固定式消防水炮用于扑数一般固体火灾和油类火灾。()
与糖尿病密切相关的是:()A.外耳道胆脂瘤 B.恶性外耳道炎 C.局限性
阿尔德弗尔于1969年提出了ERG理论。该理论把人类需要分为()。A.生存的需要
《国有土地上房屋征收与补偿条例》将公共利益与商业开发征收彻底分开,排除了一此显然
在垄断资本主义阶段,垄断组织获取垄断利润的主要方式是()。A.划分垄断市场 B
最新回复
(
0
)