答案解析
31.正确答案为B.文章第一段只是将美国黑人与美国白人的癌症死亡率进行了比较。
32.正确答案为D.前三项原因在文章第三段中都被提到了，而早期诊断是有助于降低癌症死亡率的。
33.正确答案为A.从文章的第六段可以得知，癌症越早发现越有利于治疗。
34.正确答案为C.文章的第七段提到，大力开展宣传教育有助于消除不平等的社会差异。
35.正确答案为D.从文章的最后一段可以得知，1992年以来，美国黑人的癌症死亡率下降了。
Crystal Ear
One day a friend asked my.wife Jill if I wanted a hearing aid.“He certainly does.”repliedJill.After hearing about a remarkable new product.Jill finally got up the nerve to ask me if I’dever thought about getting a hearing aid.“No way，”I said.“It would make me look 20 years older.” “No.no.”she replied.”This is entirely different.It’s Crystal Ear！”
Jill was right.Crystal Ear is different—not the old. Styled body worn over-the.ear aid.but all advanced personal sound system so small that it’s like contacts(隐形眼镜)for your ears.And Crystal Ear is super-sensitive and powerful.too.You will hear sounds your ears have been missing for years.Crystal Ear will make speech 10uder，and the sound is pure add natural.I couldn’t believe how tiny it is.It is smaller than the tip of my little finger and it’s almost invisible When worn.There are no wires.no behind—the.ear device.Put it in your ear and its ready—to-wear mold(形状)fits comfortably.Since it’s not too loud or too tight，you may even forget that you’re wearing it！ Use it at work or at play.And if your hearing problem is worse in certain situations，use Crystal Ear only when you need it.
Hearing loss，which Occurs typically prior to teenage years，progresses throughout one’s lifetime.A1though hearing loss is now the world’s number one health problem，nearly 90 percent of people suffering hearing 10SS choose to leave the problem untreated.For many millions，treating hearing 10SS in a conventional way can involve numerous office visits，expensive testing and adjustments to fit your ear.Thanks to Crystal Ear，the“sound solution”is now convenient.
Almost 90 percent of people with mild hearing loss，and millions more with just a little hearing drop-off(下降)，can be dramatically helped with Crystal Ear.More over， its superior design isenergy-efficient，so batteries can last months.Crystal Ear is now available to help these people treat their hearing loss with a small hearing amplifier(放大器).
36 Initially the writer did not want t0 buy a hearing aid because
A it would make him look old.
B it would make him nervous.
C it was too expensive.
D it was old-styled.
37 Which of the following is NOT true of Crystal Ear7
A It is highly sensitive.
B It is powerful.
C It is invisible.
D It is wireless.
38 One special feature of Crystal Ear is that
A you can control its volume.
B you needn’t take it off everyday.
C it is solar-powered.
D it saves power.
39 According to the passage，hearing loss is
A only a minor health problem.
B the world’s most common health problem.
C merely a teenage disease.
D an incurable disease.
40 Many people leave their hearing problem untreated because
A it is not serious.
B Crystal Ear is not yet available.
C it is not easy to have it treated.
D they don’t want to look old.
答案解析
36.正确答案为A.从文章第一段中的第三句话可以看出，作者的第一反应是戴助听器会使他看上去老许多。
37.正确答案为C.文章第三段中的第一句提到，“水晶耳”几乎看不见，但这并不等于看不见。
38.正确答案为D.从文章的倒数第二句可以得知，“水晶耳”的非凡设计使其十分节能。
39.正确答案为B.从文章的最后一段第二句的前半部分可以得知，失聪目前是世界头号健康问题。
40.正确答案为C.从文章的最后一段可以得知，许多失聪患者有病不治的原因是该病治起来十分麻烦。