Question

16．The Healthy habits survey（調查） shows that only about one third of American seniors have correct habits．Here are some findings and expert advice．
1．How many times did you brush your teeth yesterday？
 Findings：A full 33% of seniors brush their teeth only once a day．
 Step：Remove the 300 types of bacteria in your mouth each morning with a battery-operated toothbrush．Brush gently for 2 minutes，at least twice a day．
2．How many times did you wash your hands or bathe yesterday？
 Findings：Seniors，on average，bathe fewer than 3 days a week．And nearly 30% wash their hands only 4 times a day---half of the number doctors recommend．
 Step：We touch our faces around 3，000times a day---often with hot running water and soap for 20 seconds．
3．How often do you think about fighting germs（病菌）？
Findings：Seniors are not fighting germs as well as they should．
Step：Be aware of germs．Do you know it is not your toilet but your kitchen sponge （海綿） that can carry more germs than anything else？To kill these germs，keep your sponge in the microwave for 10 seconds．
29．What is found out about American seniors？D
A．Most of them have good habits．
B．Nearly 30% of them bathe three days a week．
C．All of them are fighting germs better than expected．
D．About one third of them brush their teeth only once a day．
30．Doctors suggest that people should wash their handsD．
A．twice a day               
B．three times a day
C．four times a day            
D．eight times a day
31．Which of the following is true according to the text？C
A．We should keep from touching our faces．
B．There are less than 300 types of bacteria in the mouth．
C．A kitchen sponge can carry more germs than a toilet．
D．We should wash our hands before touching a door handle．

Answer 1

分析 本文是關于健康習慣的調查．在一天刷幾次牙，洗手沐浴幾次，以及多久考慮過和細菌戰(zhàn)斗一次等方面，描述了一些美國老年人的習慣并給出了專家建議．

解答 29．D．細節(jié)理解題．根據(jù)"A full 33% of seniors brush their teeth only once a day．"可知大約三分之一的美國老年人一天只刷一次牙，故選D．
30．D．細節(jié)理解題．根據(jù)"And nearly 30% wash their hands only 4 times a day----half of the number doctors recommend．"一天洗4次手是專家建議的一半，可知專家建議每天洗8次手．故答案選D．
31．C．細節(jié)理解題．根據(jù)"Do you know it is not your toilet but your kitchen sponge（海綿）that can carry more germs than anything else？"可知廚房里的海綿比任何其他東西（包括廁所）攜帶的細菌都多．所以C是正確的．

點評 考察學生的細節(jié)理解和推理判斷能力，做細節(jié)理解題時一定要找到文章中的原句，和題干進行比較，再做出正確的選擇．在做推理判斷題不要以個人的主觀想象代替文章的事實，要根據(jù)文章事實進行合乎邏輯的推理判斷．