Question

15．Measuring up to 10.5 feet in length，the western green mamba （曼巴蛇） is the second longest snake in Africa，with the black mamba being the first．It is also the most agile （敏捷的） snake in the mamba family．Their color is changeable，which helps them join their environment．Another distinctive feature of the snake is its long tail with a sharp point．
The western green mamba lives in rain forests．Being an arboreal species，these snakes spend most of their time moving among the tree tops．However，they usually leave their trees to pursue a potential meal on the ground．The western green mamba is mostly active at day，but can also be seen hunting at night．
The diet of a western green mamba consists of birds and a variety of small mammals such as squirrels，mice and even bats．These snakes will approach their targets with the help of their natural skin color．When they are close enough，they will bite their victims and inject them with venom（毒液） quickly．Once the target has died，the weatern green mamba will swallow its meal whole．If faced with danger，these snakes will try to run away．If they are cornered，however，they will become extremely aggressive and strike with their sharp teeth repeatedly．The female weatern green mamba is the one who lays eggs．She will lay eggs anywhere．The young snakes are completely independent．The mother and father play no part in raising the baby snakes．The babies are born with everything they need to survive in the wilderness．They will have almost no natural predators（捕食者）to worry about when they reach adulthood．
29．In order to avoid being found，the western green mambaD．
A．spends most of the day sleeping
B．rarely comes out to hunt for food
C．tends to stay on trees most of the day
D．hides itself well with the help of its skin color
30．What does the underlined word"arboreal"in the second paragraph probably mean？C
A．Mainly feedig on meat．
B．Mainly feeding on plants
C．Living on trees most of the time           
D．Living in the grass most of the time
31．When is the western green mamba most aggressive？D
A．when it has to protect its eggs
B．When it is searching for food．
C．When it approaches its target
D．When it gets no way to escape
32．What can we learn from the text？D
A．The western green mamba can be found all over Africa．
B．The western green mamba is the longest snake in Africa．
C．The western green mamba often swallows live animal whole．
D．The baby western green mamba doesn't need care．

Answer 1

分析 本文讲述了生活在非洲大陆上的第二长蛇，曼巴蛇．介绍了其特征，栖息地，食物及习性．

解答 DCDD
29．D  细节理解题 根据第一段Their color is changeable，which helps them join their environment．可知，曼巴蛇的皮肤是可变的，这是它的保护色，用来伪装捕猎，故答案为D
30．C 细节理解题 根据下句Being an arboreal species，these snakes spend most of their time moving among the tree tops．可知，arboreal意思是在树上生活的，谷答案为C
31．D 细节理解题 根据最后一段If they are cornered，however，they will become extremely aggressive and strike with their sharp teeth repeatedly．可知，当蛇无路可走的时候，会非常具有攻击性，故答案为D
32．D 细节理解题 根据最后一段The mother and father play no part in raising the baby snakes．The babies are born with everything they need to survive in the wilderness．可知，曼巴蛇的幼蛇是得不到成年蛇的照顾，全靠自己生存，所以答案为D

点评 本文考查细节题为主，细节题可以在文章中直接找到与答案有关的信息？或是其变体．搜查信息在阅读中非常重要它包括理解作者在叙述某事时使用的具体事实、数据、图表等细节信息．在一篇短文里大部分篇幅都属于这类围绕主体展开的细节．做这类题一般采用寻读法？即先读题，然后带着问题快速阅读短文，找出与问题有关的词语或句子，再对相关部分进行分析对比，找出答案