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Researchers continue to show the power behind our sense of smell.Recent studies have found,among other things,that the smell of foods like pizza can cause uncontrollable anger in drivers on roads."
The review explains that smell is unique in its effects on the brain.According to Conrad King,the researcher who carried out the review,"more than any other senses,the sense of smell goes through the logical(邏輯的) part of the brain and acts on the systems related to feelings.This is why the smell of baking bread can destroy the plan of the best dieter."
   Smell has always been the least understood of our senses.Our noses are able to detect up to 10,000 different smells.Our ability to smell and taste this large range of smells is controlled by something like 1,000 genes(基因),which make up an amazing 3% of the human genome(基因組).Researchers Richard Axel and Linda Buck were together awarded a Nobel Prize in 2004 for their amazing research on the nature of this special sense.These two scientists were the first to describe the family of 1,000 olfactory(嗅覺) genes and to explain how our olfactory system works.
   According如o one study in the research review,smelling fresh pizza or even the packaging of fast foods can be enough to make drivers feel impatient with other road users.They are then more likely to speed and experience uncontrollable anger on roads,The most reasonable explanation is that these can all make drivers feel hungry,and therefore eager to satisfy their needs.
   However,the smells of peppermint and cinnamon(薄荷和桂皮) were shown to improve concentration levels as well as reduce drivers' impatience.Similarly,the smells of lemon and coffee appeared to help to get clear thinking and mental focus.
   However,the way genes control smell differs from person to person.A study by researchers in Israel has recognized at least 50 olfactory genes which are turned on in some people and not in others.They believe this may explain why some of us love some smells and tastes while others hate them.The Israel researchers say their study shows that nearly every human being shows a different pattern of active and inactive smell-detecting receptors(感受器).

(1)What did Richard Axel and Linda Buck find out?
C
C

A.The type of food smells.
B.The logical part of human brain.
C.The nature of human olfactory system.
D.The relationship between food and feelings.
(2)Which of the following can help people concentrate?
D
D

A.Bread.
B.Fruits.
C.Fast food.
D.Coffee.
(3)What do we know from the last paragraph?
C
C

A.Every person has a different pattern of genes.
B.Some people can recognize up to 50 smells.
C.Different people are sensitive to different smells.
D.There are still some olfactory genes to be found out.
(4)What is the passage mainly about?
B
B

A.Logic and behaviour.
B.Smell and its influence.
C.Sense ability and food tastes.
D.Olfactory genes and its system.

【考點(diǎn)】說明文;科普知識(shí)
【答案】C;D;C;B
【解答】
【點(diǎn)評】
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發(fā)布:2024/5/27 14:0:0組卷:3引用:1難度:0.5
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    發(fā)布:2024/10/27 17:0:2組卷:6引用:1難度:0.5
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