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推荐文章：2004年6月四级B卷和参考答案
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Part I Listening Comprehension (20 minutes) Section A Directions: In this section, you will hear 10 short conversations. At the end of each conversation, a question will be asked about what was said.
sp;the needs of poultry
C) is fully utilised in meat and egg production
D) is inefficiently converted into meat and eggs
28. Western governments encourage the poultry industry in Asia because th ey regard it
as an effective way to _______
___.
A) boost their own exports
B) alleviate malnutrition in Asian countries
C) create job opportunities in Asian countries
D) promote the exports of Asian countries
29. The wordcarcass(Line 2, Para.3) most probably means__________ .
A) vegetables preserved for future use
B) the dead body of an animal ready to be cut into meat
C) expensive food that consumers can hardly afford
D) meat canned for future consumption
30. What the last paragraph tells us is the author’s _________ .
A) detailed analysis of the ways of raising poultry in Bangladesh
B) great appreciation of the development of poultry industry in Bangladesh
C) critical view on the development of the poultry industry in Bangladesh
D) practical suggestion for the improvement of the poultry industry in Bangladesh
Questions 31 to 35 are based on the following passage
We all have offensive breath at one time or another. In most cases, offensive breath emanates from bacteria in the mouth, although there are other&nbs
p;more causes.
Until a few years ago, the most doctors could do was to counsel patients with bad breath about oral cleanliness. Now they are finding new ways to treat the usually curable condition.
Bad breath can happen whenever the normal flow of saliva(唾液) slows. Our mouths are full of bacteria feeding on protein in bits of food and shed tissue. The bacteria emit evilsmelling gases, the worst of which is hydrogen sulfide(硫 化物).
Mouth bacteria thrive in airless conditions. Oxygenrich saliva keeps their numbers down. When we sleep, for example, the saliva stream slows, and sulrueproducing bacteria gain the upper hand, producing classicmorning breath.
Alcohol hunger, too much talking, breathing through the mouth during exerciseanything that dries the mouth produces bad breath. So can stress, though it’s not understood why. Some people’s breath turns sour every time they go on a job interview.
Saliva flow gradually slows with age, which explains why the elderly have more bad breath trouble than younger people do. Babies, however, who make plenty o
f saliva and whose mouths contain relatively few bacteria have characteristically sweet breath.
For most of us, the simple, drymouth variety of bad breath is easily cured . Eating or drinking starts saliva and sweeps away many of the bacteria. Breakfast often stops morning breath.
Those with chronic dry mouth find that it helps to keep gum, hard candy, or a bottle of water or juice around. Brushing the teeth wipes out drymouth bad breath because it clears away many of the offending bacteria.
Surprisingly, one thing that rarely works is mouthwash. The liquid can mask bad breath odor with its own smell, but the effect lasts no more than an hour. Some mouthwashes claim to kill the bacteria responsible for bad breath. The trouble is, they don’t necessarily reach all offending germs. Most bacteria are well protected from mouthwash under thick layers of mucus(粘液). If the mouthwash contains alcohol-as most do-it can intensify the problem by drying out the mouth.
31. The phrase emanate fromin Paragraph 1 most probably means ______.
A) thriv
e on B) account for
C) originate from D) descend from
32. Which of the following is mentioned as one of the causes of bad breath
A) Tooth trouble B) Sulfurrich food.
C) Too much exercise. D) Mental strain.
33. According to the passage, alcohol has something to do with bad breath mainly because
______.
A) it keeps offending bacteria from reproducing
B) its smell adds to bad dreath
C) it kills some helpful bacteria
D) it affects the normal flow of saliva
34. Mouthwashes are not an effective cure for bad breath mainly because _______.
A) they can’t mask the bad odor long enough
B) they can’t get to all&上一页 [1] [2] [3] [4] [5] [6] [7] [8] 下一页 |
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