2018年职称英语《理工类》概括大意练习（3）:2018职称英语考试时间
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 case1.
2 But it"s a question the public keeps asking while the government are making preparations for the next flu pandemic. So the Centers for Disease Control and Prevention （CDC） came up with2 preliminary guidelines. "We don"t want people wearing them everywhere，" said the CDC. "The overall recommendation really is to avoid exposure."
3 When that"s not possible3,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 you4. 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 pandemics 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 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 subway5 instead.
6 Nor does flu only spread through the air6. Say7 someone covers a sneeze with his or her hand,then touches a doorknob or subway pole8. 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.
练习：
1.Paragraph 2 _________.
2.Paragraph 3 _________.
3.Paragraph 5 _________.
4.Paragraph 6 _________.
A Reasons for Excluding Masks from the Self-protection List
B Effort to Stop Flu from Spreading
C When to Use Face Masks
D Guidelines on Mask Use
E Warnings from the CDC
F Danger of Infection through Germy Hands and Masks
5.The scientists are trying to find out if masks may or may not _________.
6.The CDC is afraid that the public may _________.
7.The public will not know the answer about masks until scientists _________.
8.We can infer from the passage that the US authorities _________.
A overuse face masks
B deal with the mask problem seriously
C rub their faces and noses in the subway
D protest against the mask guidelines
E help protect people from being attacked by a flu
F announce the results of their mask research
答案与题解：
1.D 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是答案。
2.C 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的“When to use masks”概括了本段的大意，因此是答案。
3.A 第五段列举了流感期间自我保护的几条意见，最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，如果列人可能会产生弊病。选项A的“Reasons for excluding masks from the self-protection list”概括了本段的大意，所以是答案。
4.F 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，所以是答案。
5.E 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是答案。
6.A 第二段说CDC出台了指导原则，其中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是答案。
7.F 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是答案。
8.B 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是答案。