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
2024-05-16
7
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/3601144.html
相关试题推荐
[originaltext]TheaveragecollegestudentinAmericaspentanestimated700
[originaltext]TheaveragecollegestudentinAmericaspentanestimated700
[originaltext]Snowsportisabigbusiness.Skiareashelpsupportlocalec
[originaltext]Snowsportisabigbusiness.Skiareashelpsupportlocalec
[originaltext]W:LookattheseclothesdesignedbytopfashiondesignerlikeVe
[originaltext]W:LookattheseclothesdesignedbytopfashiondesignerlikeVe
[originaltext]W:LookattheseclothesdesignedbytopfashiondesignerlikeVe
[originaltext]M:Ithinkboardingschoolscanprovidebesteducationforchildr
[originaltext]W:Well,hello,Jack!Haveyoumovedorsomething?Youhaven’tbeen
[originaltext]W:Well,hello,Jack!Haveyoumovedorsomething?Youhaven’tbeen
随机试题
Itisnotsurprising,【C1】________thelackoffitbetweengiftedstudentsan
下列哪项不属于机构会计系统的要求()A.区分会计类型 B.决定会计格式 C
假设某商业银行存在负债敏感型缺口,则市场利率上升会导致银行的净利息收入()。
A.灰黄霉素 B.土霉素 C.青霉素 D.链霉素 E.红霉素可导致急性肌
某化学反应在任何温度下均可自发进行,下列关于反应的叙述中,正确的是()。
因产品存在缺陷造成人身,缺陷产品以外的其他财产损害的,根据《中华人民共和国产品质
患者,女性,28岁。妊娠8个月。下前牙舌侧牙龈发现肿物6个月,缓慢增大,影响进食
在其他条件相同的情况下,下列各项中,可以加速现金周转的是()。A.减少存货
下列关于银行保函的说法,错误的是()。A.其侧重点在于担保而不在于付款 B
婴儿期的特点是( )。A.容易发生龋齿 B.体格生长缓慢 C.口语发育迅速
最新回复
(
0
)