導語：這是關於職稱英語中的《理工類》的閱讀理解內容習題，需要考試的小夥伴們一定要多做題目，增強我們的語感知識。
Face Masks May Not Protect from Super-flu
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.
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 with preliminary guidelines. "We don't want people wearing them everywhere," said the CDC. "The overall recommendation really is to avoid exposure."
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.
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.
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 subway instead.
Nor does flu only spread through the air. Say someone covers a sneeze with his or her hand,then touches 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.
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.
31. What is the passage mainly about?
A. Widespread use of face masks.
B. Possibility of a worldwide flu outbreak.
C. New discoveries of a face mask research.
D. Effectiveness of wearing face masks.
32. The CDC suggests that people__________.
A. stay alone when being sick.
B. wear face masks when going to a crowded place.
C. wear face masks wherever possible.
D. remain at home if living with someone who's sick.
33. The word "that" in Paragraph 3 refers to__________.
A. making preparations.
B. avoiding exposure.
C. coming up with guidelines.
D. wearing face masks everywhere.
34. Which of the following statements is true?
A. Scientists warn the next flu is coming soon.
B. Asian bird flu is spreading easily from person to person.
C. Masks protect people because they keep viruses away.
D. Masks are not effective if a flu strikes.
35. One of the concerns the CDC has is that__________.
A. masks may give people a wrong assumption of being safe.
B. the sick may not wear masks and go out.
C. flu virus may spread via public transportation.
D. healthy people may not know how to protect themselves.
31.D。主旨題。題幹：該篇文章主要是關於什麼的?從題目看，口罩可能不能防禦超級流感;再從各段的首尾句來看，主要談論的是流感期間戴口罩是否有效，例如首段的首句“如果發生超級流感，口罩可能無法保護你”，再如尾段的首句“人們是否應該使用口罩仍舊是個問題”，故該題的答案為D。其中，選項c具有迷惑性，但是從尾段可以看出“公眾不得不耐心等待科學家仍在進行的口罩研究的結果”，所以排除c。
32.B。細節題。題幹：CDC建議人們__________。利用題幹關鍵詞CDC可定位到文章第二段的最後一句，及CDC認為“我們不想要人們到處戴口罩，我們總體的建議是儘量避免暴露”，同時根據選項可以定位到第三段，其中CDC認為三種情況下要考慮戴口罩：到人口密集的地區;你生病同時可能與家人有親密接觸時;與你同住的人生病了，但是需要出門。由此可知該題答案為B。
33.B。猜詞題。題幹：第三段的“that”指的是__________。第三段首旬“When that’s not possible”意為“當那不可避免時”，顯然that指代的是該句前所提到的資訊，即第二段最後一句，意為“我們不想要人們到處戴口罩，我們總體的建議是儘量避免暴露”，由此推斷that指代的是“儘量避免暴露”，所以該題答案為B。
34.D。判斷題。題幹：下列哪一項是正確的?因為題幹無明顯關鍵詞，可以改為定位選項，利用四個選項中的關鍵詞分別定位選項。根據選項A的關鍵詞scientists和next flu可以定位到第四段的第二句，可知“科學家不能預測下一場流感什麼時候到來”，由此判斷選項A與原文不一致：根據選項B的關鍵詞Asian bird flu可以定位到第四段的第二句，可知“如果亞洲地區的禽流感開始在人與人之間輕鬆傳播，那麼就會導致下一場流感的爆發，對此人們的焦慮日益增長”，可知亞洲的禽流感還未在人與人之間傳播，由此判斷選項B與原文不一致;利用選項c的關鍵詞masks和virus可以定位到第五段，可知“為什麼不把口罩列為自我保護的清單之中呢?因為口罩可以限制咳嗽或者噴嚏造成的那些在空中傳播的`病毒。簡單的手術口罩只能過濾較大的病毒顆粒”，由此可知口罩並不能完全隔離病毒，所以選項C與原文不一致。
35.A。細節題。題幹：CDC的關注之一是__________。利用題幹關鍵詞CDC和concern可以定位到文中第五段的倒數第二句，可知“CDC擔心口罩可能知道虛假的安全感”，原文中的be afraid of與題幹中的concern為同義改寫，所以該題答案為A。分別定位其他選項的關鍵詞，發現其他選項與原文的資訊都不一致。
