Its the people and their history of habitation(习俗)______turn a city from a collection of
Its the people and their history of habitation(习俗)______turn a city from a collection of streets and buildings into a community.
A.what
B.which
C.that
D.where
Its the people and their history of habitation(习俗)______turn a city from a collection of streets and buildings into a community.
A.what
B.which
C.that
D.where
A、a fixed arrangement of words, esp. as used on social, legal or ceremonial occasions
B、a group of letters, numbers, or other symbols which represents a scientific or mathematical rule
C、a method, plan, or a set of principles worked out to achieve a desired result
D、null
A、surplus
B、survival
C、soar
D、surge
Scientific tests have shown that total silence can be very frightening experience for human beings. However,some people enjoy listening to pop music which is very loud,and this can do harm to their eardrums (耳鼓).The noise level in some disco is far above the usual safety level for heavy industrial areas. One recent report about noise and concentration (专心)suggested that although a lot of people say that any noise disturbs their concentration, what really affects their ability to concentrate is a change in the level of noise. It goes on to say that a background noise, which doesn’ t change too much (music,for example) may even help people to concentrate.
From this passage,the pollution of noise____.
A.doesn’ t matter much
B.has become worse everywhere
C.has become better in big cities
D.has become better in villages
“Background music” in the passage means____.A.music played in the concert
B.a kind of noise coming into your ears
C.music which helps people to concentrate
D.music played while people are working
Some people may have their hearing hurt____.A.while they are in complete silence
B.while they are dancing violently
C.while they are listening to pop music
D.while they are listening to soft music
Scientists have discovered that what prevents people from concentrating is____.A.any kind of noise
B.great changes in level of noise
C.background noise
D.various background music
A、red bloodcell
B、DNA
C、carbon nanotube
D、carbon nanotube
A.which
B.who
C.that
D.what
A.also
B.too
C.still
D.above all
A.float
B.floating
C.to float
D.to be floated
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