题目内容
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The author mentions all of the following as results of a blackout EXCEPT ______.
A．refrigerated food item may go bad
B．traffic lights do not work
C．people must rely on candlelight
D．elevators and escalators do not function
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更多“The author mentions all of the…”相关的问题
When the author mentions the Indian fakir, he shows that______
A．fakirs possess magic power
B．Indians are not afraid of pain
C．people can learn to cope with pain
D．some people are born without a sense of pain
The author specifically mentions that ______.
A．black Americans are most prejudicially treated in the U. S.
B．discrimination in the South was not more obvious than in the North
C．the situation of blacks is almost the same today as it was in the 1930s
D．after blacks became free people they didn't experience discrimination in employment and public facilities
The author mentions the ports of Los Angeles and Long Beach to ______.
［A］prove they are the largest ports in the United States
［B］demonstrate they create many new job opportunities
［C］highlight that shipping is less glamorous than making movies
［D］emphasize the role of shipping in southern California's economy
The author mentions that published music is not considered to be folk music because
A．the original composer can be easily identified
B．the songs attract only the young people in a community
C．the songs are generally performed by professional singers
D．the composers write the music in rural communities
The author mentions big cities such as Tokyo, Singapore and Paris______.
A. to show that city people all over the world have a lot in common
B. to let his readers be aware that they are some of the world's biggest cities
C. to illustrate their difference from American cities
D. because they are some of the cities that attract visitors most
A．an inspiring dream
B．a new home
C．an encounter with a strange beast
D．a valiant deed
The author mentions food, tools and precious metals and stones together because they are all ________. A. useful items B. articles of value C. difficult things to obtainD. material objects
A、often used when other means are impossible
B、necessary for normal communication
C、the only highly developed system of communication
D、the most developed form
Late-night Drinking
Coffee lovers beware. Having a quick "pick-me-up" cup of coffee late in the day will play havoc with your sleep. As well as being a stimulant, caffeine interrupts the flow of melatonin, the brain hormone that sends people into a sleep.
Melatonin levels normally start to rise about two hours before bedtime. Levels then peak between 2 am and 4 am, before falling again. "It's the neurohormone that controls our sleep and tells our body when to sleep and when to wake," says Maurice Ohayon of the Stanford Sleep Epidemiology Research Center at Stanford University in California. But researchers in Israel have found that caffeinated coffee halves the body's levels of this sleep hormone.
Lotan Shilo and a team at the Sapir Medical Center in Tel Aviv University found that six volunteers slept less well after a cup of caffeinated coffee than after drinking the same amount of decaf. On average, subjects slept 336 minutes per night after drinking caffeinated coffee, compared with 415 minutes after decal They also took half an hour to drop off — twice as long as usual — and jigged around in bed twice as much.
In the second phase of the experiment, the researchers woke the volunteers every three hours and asked them to give a urine sample. Shilo measured concentrations of a breakdown product of melatonin. The results suggest that melatonin concentrations in caffeine drinkers were half those in decal drinkers. In a paper accepted for publication in Sleep Medicine, the researchers suggest that caffeine blocks production of the enzyme that drives melatonin production.
Because it can take many hours to eliminate caffeine from the body, Ohayon recommends that coffee lovers switch to decaf after lunch.
The author mentions "pick-me-up" to indicate that
A．melatonin levels need to be raised.
B．neurohormone can wake us up.
C．coffee is a stimulant.
D．decaf is a caffeinated coffee.
