首页
登录
职称英语
[originaltext] Many say their brain doesn’t start working properly in the mo
[originaltext] Many say their brain doesn’t start working properly in the mo
游客
2023-08-28
38
管理
问题
Many say their brain doesn’t start working properly in the morning until they have had a cup of coffee. (30)But the stimulating effect for which caffeine is famous may be an illusion, say researchers. Those who drink a lot of coffee may feel more alert after their first cup of the day. But this is probably because it reverses the fatiguing effects of overnight caffeine withdrawal, say the researchers. (31)Their study suggests coffee drinkers may actually be better off without their habitual morning mug as it raises the risk of anxiety and high blood pressure. In the study, 379 people who abstained from caffeine for 16 hours before drinking either caffeine or a placebo (安慰剂)were tested for a range of responses afterwards. The Bristol University researchers found little variance in levels of alertness among the volunteers. Around half the volunteers drank little or no caffeine and the other half were medium-high caffeine consumers. All were asked to rate their levels of anxiety and alertness and whether they had a headache before and after being given the caffeine or the placebo. They were also asked to carry out a series of computer tasks to test their levels of memory, attentiveness and vigilance. The medium-high caffeine consumers who received the placebo reported a fall in alertness and an increase in headaches, neither of which were reported by those who received caffeine. However, their post-caffeine levels of alertness were no higher than those of no or low-level consumers received a placebo. (32)This suggests caffeine only brings coffee drinkers back up to "normal."
30. What does the passage say about coffee?
31. What does the study suggest coffee drinkers do?
32. What does the study say about caffeine?
选项
A、Its stimulating effect is an illusion.
B、It stimulates your nerves.
C、It supplies nutrition to the brain.
D、It makes you more tired.
答案
A
解析
推理判断题。短文开头指出,很多人声称每天早上必须喝杯咖啡才能让大脑清醒,但是研究人员指出,咖啡因的刺激效果恐怕是一种错觉。
转载请注明原文地址:https://tihaiku.com/zcyy/2966000.html
相关试题推荐
[originaltext]CaptainJosephMackey’sairplanewasflyingovertheoceanon
[originaltext]Pianosarenormallyfoundinbuildingforobviousreasons.H
[originaltext]Investmentinthepublicsector,suchaselectricity,irrigat
[originaltext]Investmentinthepublicsector,suchaselectricity,irrigat
[originaltext]M:Goodmorning.CanIhelpyou?W:GoodMorning.We’dliketobo
[originaltext]M:Goodmorning.CanIhelpyou?W:GoodMorning.We’dliketobo
[originaltext]M:Nancy,whatclassesareyoutakingthissemester?W:I’mnots
[originaltext]Soccerisplayedbymillionsofpeopleallovertheworld,b
[originaltext]Soccerisplayedbymillionsofpeopleallovertheworld,b
[originaltext]Soccerisplayedbymillionsofpeopleallovertheworld,b
随机试题
Usingthisscopeto______yourviewcanmakeiteasiertoseethedistanttarge
WHO,workingcloselywithitsMemberStates,otherUnitedNationsagenciesan
Myparentsalwayseducatedmeto______(预留一钱以备急用).reservesomemoneyforemergen
震颤麻痹患者出现的肌张力表现是()。A.降低 B.增高 C.先降低后亢进
根据预期的健康教育效果,又可以将具体目标分为认知目标、()和健康目标3类。A.整
患者男性,43岁,肛周肿痛4天,肛门左侧皮肤发红并伴疼痛,以坐时及排便时明显,2
下列关于设计概算的描述,错误的是( )。 A、设计概算一经批准,将作为控制投
对于现场的局部放电探测,采用声学法,可以通过()来发现缺陷的位置。(A)具有最高
当任一台站用变退出时,()应切换至失电的工作母线段继续供电。运行站用变$;$
与个人任职有关的收入,可按全年一次性奖金计税的有( )。A.提前退休而取得的一
最新回复
(
0
)