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
2023-09-14
47
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] Why do tornadoes appear to be dark?
选项
A、They occur only at night.
B、They are funnel-shaped.
C、They pick up debris from the ground.
D、They are water-laden.
答案
C
解析
这道题的解题关键就是文中"As this funnel dips earthward,it becomes darker because of the debris that is forced into its intensifying votex.”
转载请注明原文地址:https://tihaiku.com/zcyy/3013672.html
相关试题推荐
【B1】[br]【B13】A、revolvingB、stirringC、mixingD、rotatingB因为河堤很坚固,所以船行驶时激起的水才不会
【B1】[br]【B13】A、revolvingB、stirringC、mixingD、rotatingB砖块、石头和水泥可使岸堤坚固,因此即使水面
Tornadoes,whirlwinds,andwatersproutsarerotatingfunnelcloudairmasses
Tornadoes,whirlwinds,andwatersproutsarerotatingfunnelcloudairmasses
Tornadoes,whirlwinds,andwatersproutsarerotatingfunnelcloudairmasses
Tornadoes,whirlwinds,andwatersproutsarerotatingfunnelcloudairmasses
Tornadoes,whirlwinds,andwatersproutsarerotatingfunnelcloudairmasses
随机试题
"Congratulations,Mr.Cooper,it’sagirl."Fatherhoodisgoingtohave
Anumberofscientificstudieshavefoundthattheamountofsugarweconsum
COVERLETTERDearMr.Johnson:
根据以下资料 2010年,广西壮族自治区全年粮食种植面积3061.06千公顷,
土石坝渗流分析的内容是()。A.为稳定计算提供数据 B.确定浸润线的位置
动力触探的试验方法包括:()A.轻型N10 B.中型N28 C.小型N
下列哪组不是大柴胡汤的组成部分A.柴胡、黄芩 B.白芍、半夏 C.枳实、生姜
材料 某地一所农村幼儿园,由于房舍年久失修,损坏严重,上级主管部门为其专门拨出
在《文物保护法》中规定,保存文物特别丰富并且具有重大历史价值或者革命纪念意义的(
甲公司向乙公司签发一张金额为35万元的银行承兑汇票,用于支付购买设备的价款。乙公
最新回复
(
0
)