A.deliberate
B.obvious
C.not readily apparent
D.very pronounced
A.hear the music
B.appreciate the music
C.enjoy the music fully
D.completely understand the music
开始考试点击查看答案A.moving some part of their body
B.stopping what they are doing
C.directing the orchestra playing it
D.wishing that they could conduct music properly
开始考试点击查看答案A.both are mental acts
B.muscles participate in both processes
C.both processes are performed by the entire body
D.we derive equal enjoyment from them
开始考试点击查看答案A.not a mental process
B.more of a physical process than a mental action
C.a process that involves our entire bodies
D.a process that involves the muscles as well as the brain
开始考试点击查看答案A.The pilot
B.The mountain climber
C.The business man
D.The doctor
开始考试点击查看答案A.height of the hill
B.speed of sound
C.distance to the hill
D.intensity of sound
开始考试点击查看答案A.new electronic instruments for planes
B.a radio directing and ranging device
C.new radio sets for RAF bombers
D.an electronic detecting device
开始考试点击查看答案A.were more exact than sound waves
B.could not be detected
C.could penetrate fog and clouds
D.were easier to use than sound waves
开始考试点击查看答案A.Light waves could be used in a device similar to radar.
B.Radar was a practical application of a well-known principle
C.Radar greatly increased the effectiveness of RAF.
D.Sound waves are reflected from a hillside under all conditions.
开始考试点击查看答案A.exactly how radar works
B.why the British used radio waves in their device
C.how the word “radar” came into being
D.how radar helped the British win the Battle of Britain
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