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共用题干 Face Masks May Not Protect from Su

tikufree2019-12-17  22
问题 共用题干Face Masks May Not Protect from Super-flu

1 If a super-flu strikes,face masks may not protect you.Whether widespread use of masks will help,or
harm,during the next worldwide flu outbreak is a question that researchers are studying furiously.No results
have come from their mask research yet.However,the government says people should consider wearing them
in certain situations anyway,just in case.
2 But it's a question the public keeps asking while the governments are making preparations for the
next flu pandemic. So the Centers for Disease Control and Prevention ( CDC ) came up with（提出）prelimi-
nary guidelines（初步指导方针）." We don ' t want people wearing them everywhere , " said the CDC. " The
overall recommendation really is to avoid exposure."
3 When that's not possible,the guidelines say to consider wearing a simple surgical mask if you are in
one of the three following situations.First,you're healthy and can't avoid going to a crowded place.Second,
you're sick and think you may have close contact with the healthy,such as a family member checking on
you.Third,you live with someone who's sick and thus might be in the early stages of infection,but still need
to go out.
4 Influenza pandemic can strike when the easy-to-mutate flu virus shifts to a strain that people never
have experienced.Scientists cannot predict when the next pandemic will arrive,although concern is rising
that the Asian bird flu might trigger one if it starts spreading easily from person to person.
5 During the flu pandemic,you should protect yourself. Avoid crowds,and avoid close contact with the
sick unless you must care for someone.Why aren't masks added to this self-protection list?Because they can
help trap virus-laden（含有病毒的、充满细菌的）droplets flying through the air with a cough or sneeze.
Simple surgical masks only filter the larger droplets.Besides,the CDC is afraid masks may create a false
sense of security.Perhaps someone who should have stayed home would don an ill-fitting mask and hop on
the subway instead.
6 Nor does flu only spread through the air. Say someone covers a sneeze with his or her hand,then tou-
ches a doorknob or subway pole.If you touch that spot next and then put germy hands on your nose or
mouth,you've been exposed.It's harder to rub your nose while wearing a mask and so your face may get
pretty sweaty under masks.You reach under to wipe that sweat,and may transfer germs caught on the outside
of the mask straight to the nose.These are the problems face masks may create for their users.
7 Whether people should or should not use face masks still remains a question.The general public has
to wait patiently for the results of the mask research scientists are still doing.
选项 Paragraph 2 _______________A:Reasons for Excluding Masks From the Self-protection ListB:Effort to Stop Flu From SpreadingC:When to Use Face MasksD:Guideline on Mask Use E:Warnings From the CDCF:Danger of Infection Through Germy Hands and Masks
答案D
解析第二段说美国疾病控制和预防中心出台口罩使用原则，防止公众过度使用口罩。选项 D是正确答案。 第三段是对第二段的口罩使用原则作细节描述，谈及三种情况下可以使用口罩。选项 C " When to Use Face Masks”概括了本段的大意，因此是正确答案。 第五段列举了流感期间自我保护的几条意见，其中重要两条是不要到人多的地方去和 远离流感病人。使用口罩并没有列入自我保护的几条意见中。后半段解释说，如果列入可能 会产生弊病。选项A" Reasons for Excluding Masks From the Self-protection List"概括了本段的大意，所以是正确答案。 第六段的中心思想是说流感不仅仅是通过空气传染，触摸也是传染的一个途径。带有 流感病毒的手和口罩也是传染病毒的中介源。选项F概括了本段的大意，所以是正确答案。 第一段和第七段都谈到科学家正在进行有关口罩能否保护个人免受流感感染的研究。 很明显，E是正确答案。 第二段说CDC出台了指导原则，其中的一个重要目的是防止公众过度使用口罩。原句 是："We don' t want people wearing them everywhere"。选项A是正确答案。 与题干有关的内容在第七段能够找到。根据该段所表达的意思，F是正确答案。 authorities是“政府部门”。美国有关部门出台了一份包括口罩使用在内的指导原则， 又有科学家对口罩的使用问题进行专项研究，应该说工作是严肃认真的。题干接上选项B的 "deal with the mask problem seriously”就表达了这层意思。B是正确答案。第4部分：阅读理解第一篇 本文主要介绍了撒哈拉沙漠的地理位置、气候概况、农业和交通运输状况。
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