内容正文:
convinced this was true.
She and some colleagues decided to examine
waste samples from Antarctic birds for evidence of
human bacteria. To ensure(确保) the waste was
not pollutedꎬ the scientists had to collect it from
the birds themselves.
The results of their study showed the presence
of several types of human bacteria in the bird
waste. This included a common strain of bacteria
that causes food poisoning in humans. The
researchers say the bacteria kinds were resistant to
commonly ̄used human antibiotics ( 抗 生 素 )ꎬ
proving they were brought in by the visitorsꎬrather
than traveling birds.
“These strainsꎬwhich are a common cause for
infections in humans and livestockꎬdo not usually
cause death outbreaks in wild animalsꎬ” says
González ̄Solís. “ Howeverꎬ the rising or invasive
(扩散的) pathogens(病菌) that arrive to highly
sensitive populations could have severe results and
cause the extinction of some populations. ” The
researcher also fears the presence of these bugs
could know in advance the arrival of otherꎬmore
deadlyꎬpathogens as the number of tourists people
increases.
Experts believe the only way to prevent the
mass damage of the birds is to impose stricter
regulations orꎬ at leastꎬ put into effect the ones
already in place. For exampleꎬwhile the Antarctica
Treaty requires visitors to carry their waste back
home to safeguard the ancient environmentꎬ the
regulation is rarely carried out. Hopefullyꎬofficials
will take steps to protect the vulnerable birds
before its too late.
1. What problem is Antarctica facing now
according to Paragraph 1? A
A. The increasing number of tourists.
B. The worsening wilderness.
C. The reducing native bird numbers.
D. The spread of infectious illness.
2. What does the underlined word “ devastate ”
mean? A
A. Destroy. B. Increase.
C. Protect. D. Benefit.
3. Why did scientists catch some Antarctica
animals? B
A. To treat their illness.
B. To get their waste.
C. To raise them as pets.
D. To study their lifestyles.
4. What did scient