Question

5．Hair has always been an important sign of beauty，especially true for women．Next to the face，hair is one of the main qualities people look for when they consider a woman's beauty． Whether long or short，curly or straight，hair often gets a lot of attention．
Each hair grows independently of other hairs．Not all hairs experience the same period of growth at the same time．During the period of active growth，which is called Anagen，hair grows at a rate of about or one centimeter a month．About eighty five percent of hair follicles（毛囊） are going through this process at any given time．This period can last from two to six years．
The Catagen period of hair growth comes next．It is then that hair growth begins to slow down．This period usually lasts two or three weeks．Finally，hair growth comes to a complete stop and the hairs begin to fall out．This period is known as Telogen．Once the Telogen period has ended，the hair growth process begins again．
So what happens when a person has trouble growing hair or suffers from hair loss？Your genes control how fast or how long your hair will grow．Some people have a longer than usual anagen growth period．These people may be able to grow more hair than the average person．
However，others struggle to grow shoulder length hair．These people have a shorter than normal anagen period．
Your health can also affect hair growth．Poor nutrition can cause some hair follicles to stop growing or cause the hairs that grow to become weak or thin．Problems with hair growth can result from thyroid problems or other conditions．Health experts say people who experience a sudden increase in hair loss should seek medical advice．

68．How many periods of hair growth are discussed in the passage？B   
    A．Two．          B．Three．           C．Four．          D．Five．
69．The Catagen period is a period thatD．
    A．the hairs start to fall out                   B．the hairs grow at a fast rate
    C．hair growth stops completely                  D．hair growth begins to slow down
70．What can be learned from the passage？C
    A．Hair grows no more after the Telogen period．
    B．One with shoulder length hair must grow more hair．
    C．Hair growth has much to do with nutrition and health．
    D．Only a few hair follicles go through the Anagen period．
71．What is suggested by health experts when one suffers from a sudden increase in hair loss？B
    A．Changing his genes．                     B．Going to see a doctor．
    C．Cutting all his hair off．               D．Eating more vegetables．

Answer 1

分析 本文主要讲述了头发的生长分为三个时期：1、生长期--头发积极生长；2、退行期--头发生长开始减慢；3、静止时期--头发生长完全停止并开始脱落．此外，头发的生长与营养和健康有很大关系．如果你脱发很严重，应该立即看医生．

解答 68．B 细节推理题．根据第二段During the period of active growth，which is called Anagen，可知头发积极生长的时期称为生长期；根据第三段The Catagen period of hair growth comes next．可知生长期之后是退行期；根据第三段hair growth comes to a complete stop and the hairs begin to fall out．This period is known as Telogen．可知头发生长完全停止并开始脱落的时期被称为静止时期．由此可知，头发生长分为三个时期．故选B．
69．D 细节判断题．根据第三段hair growth comes to a complete stop and the hairs begin to fall out．可知在退行期，头发生长开始减慢．故选D．
70．C 细节理解题．根据最后一段Your health can also affect hair growth．Poor nutrition can cause some hair follicles to stop growing or cause the hairs that grow to become weak or thin．可知人的健康影响头发的生长．缺乏营养可能会导致一些毛囊停止生长或引起头发生长减慢．由此推知，头发的生长与营养和健康有很大关系．故选C．
71．B 细节推理题．根据最后一段Health experts say people who experience a sudden increase in hair loss should seek medical advice．可知健康专家说如果一个人突然脱发很严重，那么他应该寻求医生的意见．故选B．

点评 本文考察学生的理解推断能力以及细心程度，只要抓住文章的关键词，采用寻读的方法查找细节，就能找到正确答案．