下面的短文后有2项测试任务：(1)第23～26题要求从所给的6个选项中为第3～6段每段选择1个最佳标题：(2)第27～30题要求从所给的6个选项中为每个句子确定1个最佳选项。 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 contract 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 (流行性感冒) pandemics
(全国流行的) can strike (打击) when the easy-to-mutate flu virus shifts to a strain
that people never have experience D. 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 contract with the sick unless you must care for someone. Why can’t
mask added to this self-protection list Because they help trap virus-laden
droplets flying through the air with a cough or sneeze (打喷嚏). Simple surgical
masks only filter the larger droplets (小滴). 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 (不合的) 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.
A. Reasons for Excluding Masks from the Self-protection
List B. Effort to Stop Flu 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 Paragraph 2 ______