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HIGH WAVES；DENSE STREAKS OF FOAM ALONG THE DIRECTION OF THE WIND；CRESTS OF WAVES BEGIN TO TOPPLE，TUMBLE AND ROLL OVER；SPRAY MAY AFFECT VISIBILITY．This condition is likely to be termed ______．
A.Strong breeze
B.Near gale
C.Gale
D.Strong gale
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共用题干
第二篇The Magic of SoundMusic is one of the most beautiful forms of artistic expressions ever invented.In movies and plays, music has an added function:it not only moves people but also can shock people.Our eardrums can withstand sound within 20 to 80 decibels（分贝）.Once sound exceeds this limit , even beautiful music will become ear-splitting noise and harm health.A strong blast（响声）of high sound can twist and break a solid iron sheet.High sound of 150 decibels can kill a healthy rat.In movies,sometimes the hero can produce a sound that ordinary people can't hear and only those whohave the same ability can feel.In nature,there is actually sound that is beyond our hearing.In physics,the sound that exceeds 20,000Hz is called ultrasonic（超音波的）.Dolphins, whales and bats can make such high-frequency sound.It does no harm to health.Sound less than 20Hz is called infrasonic（次声）waves.When we move, the air will vibrate.The vibration of air can produce infrasonic waves.As the frequency of infrasonic waves is close to that of people's internal organs, infrasonic wave may cause resonance（共振）in human bodies.As a result,people's vision may weaken and internal organs may rupture（断裂）.However,whether an infrasonic wave can be used as a weapon depends on its intensity.If its intensity is very low,it won't damage internal organs or a person's health.If the intensity of infrasonic wave exceeds 160 decibels,it is extremely harmful.When wind blows at a force of 3 or 4 over the sea,it will produce infrasonic waves of several decibels.Only typhoons can produce infrasonic waves of over 100 decibels.At present,scientists can only produce infrasonic weapons in the lab with the help of advanced scientific tools and powerful electric power.What could be the best title of the passage?A:The power of music.B:The harms of noises.C:The magic of sound.D:The discovery of infrasonic waves.
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单选题If you must land on a beach with an oar-propelled lifeboat through a heavy surf，the recommended method is to（）.A
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ride in on the back of a large breakerC
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单选题（）is a radio receiver with ablity to sense direction of the incoming radio waves.A
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单选题HIGH WAVES；DENSE STREAKS OF FOAM ALONG THE DIRECTION OF THE WIND；CRESTS OF WAVES BEGIN TO TOPPLE，TUMBLE AND ROLL OVER；SPRAY MAY AFFECT VISIBILITY.This condition is likely to be termed（）.A
strong breezeB
near galeC
galeD
strong gale
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单选题An aneroid barometer is an instrument（）.A
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create large waves in the direction of the currentB
change direction 360°during a 24 hour periodC
remain fairly constant in direction and velocity throughout the yearD
are characterized by a light green color
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rollersB
breakersC
white capsD
surfers
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单选题It is not feasible to build sea defenses to protect against erosion because _____.A
it is too costly and will endanger neighbouring areasB
the government is too slow in taking actionC
they will be easily knocked down by waves and currentsD
house agents along the coast do not support the idea
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单选题A
How destructive tidal waves are.B
The cause of tidal waves.C
What a true tide is.D
Why there is seaquake.
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单选题What kind of conditions would you observe as the eye of a storm passes over your ship’s position（）.A
Huge waves approaching from all directions，clearing skies，light winds，and an extremely low barometerB
Flat calm seas，heavy rain，light winds，and an extremely low barometerC
Flat calm seas，heavy rain，light winds，and high pressureD
Huge waves approaching from all directions，clearing skies，light winds，and high pressure
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