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必修3《Reading and vocabulary》新课标PPT课件优质课下载
defination
wind speed
place
effect
how many
each year
the worst example
(time&place&
bad results）
tornado
hurricane
defination
wind
speed
place
effect
rotating column of air
strong tropical storms
more than 400 km/h
120 km/h or more
in the US, from Taxas to south Dakota
in the southern Atlantic Ocean, the Caribbean Sea and the Gulf of Mexico
pick up, put down, take......off, destroy,leave,
die,injury
cause huge waves,