更多"Asbestos is a mineral fiber that ca"的相关试题:
[单项选择]Glass-fiber cables can carry hundreds of telephone conversations()
A. spontaneously
B. simultaneously
C. immediately
D. immiscibly
[单项选择]Many forms of cancer can be cured if detected early
()
A. selected
B. operated
C. developed
D. discovered
[单项选择]
Without proper planning, tourism can cause problems. For example, (21) many tourists can (22) public places that are also enjoyed (23) the inhabitants(居住者) of a country: If tourists (24) too much traffic, the inhabitants become annoyed and (25) . They begin to dislike tourists and to (26) them impolitely. They (27) how much tourism can help the country’s economy. It is important to (28) about the people of a tourist attraction and how tourism affects it. Tourism should help a country (29) the customs and beauty that attract tourists.
Too much tourism can be a problem. If tourism (30) too quickly, people must leave other jobs to work in the tourism industry. This (31) that other parts of the country’s economy can suffer.
On the other hand, if there is not enough tourism, people can (32) jobs. Business can also lose money. It (33) a great de
A. so
B. how
C. too
D. rather
[单项选择]A daily dose of aspirin can prevent cancer in people with a genetic disorder that increases their risk of developing the disease, scientists said on Monday.
The finding could also have important implications for the wider population, although more research is needed and unraveling the connection will take some time since the benefits of aspirin were only seen after several years.
John Burn of the Institute of Human Genetics at Newcastle University in Britain said his study might also have uncovered a simple way of controlling stems cells that make tumors grow.
"We believe that aspirin may have an effect on the survival of aberrant (异常的) stem cells in the colon," Burn said, presenting his findings at the ECCO-ESMO European cancer congress in Berlin.
Burn and colleagues tested 1,071 people with Lynch syndrome (林奇综合症) — an inherited condition that predisposes a person to a range of cancers, particularly of the colon — by giving some of them aspirin and some a placebo (
A. Aspirin may offer a simple way to control stems cells that make tumors grow.
B. Aspirin may influence the survival of aberrant stem cells in the colon.
C. Aspirin may damage faulty stem cells before their mutation.
D. Aspirin may reduce the risk of developing colon cancer by blocking the COX-2.
[单项选择]Too much tourism can cause all these problems EXCEPT ______.
[单项选择]A bad snoring can cause all of the following EXCEPT______.
A. heart failure
B. brain misfunction
C. failure in breathing
D. failure to get enough sleep
[单项选择]
Insufficient () can cause a processor to work at 50% or even more below its performance potential.
A. mouse
B. I/O
C. document
D. memory
[单项选择]Can Loud Music Cause Hearing Impairment(损伤)
Have You ever gone to a concert and realized that your seats were right next to the booming speakers Are you guilty__________ (51).turning up the volume on your portable cassette or CD player to drown out the whining(哭哭啼啼)of your little brother Sometimes it’s difficult to avoid loud music or noises,but they can be bad news because loud noises can__________ (52)temporary or permanent hearing loss.
Extremely loud music and noises that go on for long periods of __________ (53) are
common causes of deafness.If a noise is so loud that you have to shout to make yourself__________ (54),there is a __________ (55)that the mechanism inside your ear can be injured Temporary hearing loss can happen after you’ve been __________ (56)to loud noise for only 15 minutes.If you have temporary hearing loss.you won’t be able to hear as __________ (57) as you normally can,and you may have tinnitus (耳鸣),which is a fancy word for ringing in the ears.Your ears
A. whereas
B. although
C. because
D. unless