阅读下面短文,从所给选项中选出能填入空白处的最佳选项,使短文通顺,结构完整,其中有一项是多余选项。
You are what you eat, as a saying goes. This is really true for the giant panda. What pandas eat has a big influence on many different parts of their lives.
(1) This is because pandas mostly eat bamboo, which is very poor in nutrition(营养) and difficult to take in. Since 99% of a panda's food is bamboo, so pandas also have really small babies because of their food. Baby pandas are born helpless and tiny. (2) No other mammal's(哺乳动物) babies are born so much smaller than their mother. But baby pandas grow quickly. (3)
The black and white fur of pandas may help them to bide(隐蔽). Once again, we can look at a panda's food to help understand the reason. In winter, they can't change their fur quickly enough to match their background like other animals can. (4) In the past, pandas lived in and travelled across large places and faced lots of predators(捕食者). So, their black and white fur was very important for them to keep safe.
(5) The main danger to pandas is not from predators, but rather from less bamboo, more human activities and climate change. The good news is that pandas are no longer known as endangered(濒临灭绝的).
A. However, things are a little different today.
B. One-year-old pandas can be about 45 kg heavy.
C. They are just 140 g, about $\frac{1}{1000}$ the size of their mother.
D. For one, pandas have to spend more than half a day eating.
E. The baby pandas can't see clearly at birth and sleep all day.
F. So being black and white helps them hide in both snow and the dark.
You are what you eat, as a saying goes. This is really true for the giant panda. What pandas eat has a big influence on many different parts of their lives.
(1) This is because pandas mostly eat bamboo, which is very poor in nutrition(营养) and difficult to take in. Since 99% of a panda's food is bamboo, so pandas also have really small babies because of their food. Baby pandas are born helpless and tiny. (2) No other mammal's(哺乳动物) babies are born so much smaller than their mother. But baby pandas grow quickly. (3)
The black and white fur of pandas may help them to bide(隐蔽). Once again, we can look at a panda's food to help understand the reason. In winter, they can't change their fur quickly enough to match their background like other animals can. (4) In the past, pandas lived in and travelled across large places and faced lots of predators(捕食者). So, their black and white fur was very important for them to keep safe.
(5) The main danger to pandas is not from predators, but rather from less bamboo, more human activities and climate change. The good news is that pandas are no longer known as endangered(濒临灭绝的).
A. However, things are a little different today.
B. One-year-old pandas can be about 45 kg heavy.
C. They are just 140 g, about $\frac{1}{1000}$ the size of their mother.
D. For one, pandas have to spend more than half a day eating.
E. The baby pandas can't see clearly at birth and sleep all day.
F. So being black and white helps them hide in both snow and the dark.
答案：(1)D (2)C (3)B (4)F (5)A
解析：
我们可以根据上下文逻辑逐一匹配选项：
1. 空后解释熊猫吃的竹子营养差、难吸收，对应D选项“首先，熊猫不得不花费半天以上的时间进食”，符合因果逻辑，引出饮食对熊猫的第一个影响。
2. 空前提到熊猫幼崽出生时无助且体型极小，空后说明没有其他哺乳动物的幼崽出生时比母体小这么多，C选项“它们只有140克，大约是母体大小的千分之一”具体说明幼崽的极小体型，衔接上下文。
3. 空前提到熊猫幼崽成长速度很快，B选项“一岁的熊猫体重可以达到约45千克”是对“长得快”的具体例证，逻辑通顺。
4. 空前提到熊猫没法像其他动物一样快速换毛适配环境背景，F选项“所以黑白的毛色能帮助它们同时在雪地和黑暗环境中隐蔽”解释了熊猫黑白毛色的隐蔽作用，承接前文。
5. 空后说明如今熊猫的主要威胁不再是捕食者，和过去面临大量捕食者的情况形成转折，A选项“然而如今情况有些不同了”完成过去到现在的逻辑转折。
多余选项E不符合任意一处的上下文逻辑。
1. 空后解释熊猫吃的竹子营养差、难吸收，对应D选项“首先，熊猫不得不花费半天以上的时间进食”，符合因果逻辑，引出饮食对熊猫的第一个影响。
2. 空前提到熊猫幼崽出生时无助且体型极小，空后说明没有其他哺乳动物的幼崽出生时比母体小这么多，C选项“它们只有140克，大约是母体大小的千分之一”具体说明幼崽的极小体型，衔接上下文。
3. 空前提到熊猫幼崽成长速度很快，B选项“一岁的熊猫体重可以达到约45千克”是对“长得快”的具体例证，逻辑通顺。
4. 空前提到熊猫没法像其他动物一样快速换毛适配环境背景，F选项“所以黑白的毛色能帮助它们同时在雪地和黑暗环境中隐蔽”解释了熊猫黑白毛色的隐蔽作用，承接前文。
5. 空后说明如今熊猫的主要威胁不再是捕食者，和过去面临大量捕食者的情况形成转折，A选项“然而如今情况有些不同了”完成过去到现在的逻辑转折。
多余选项E不符合任意一处的上下文逻辑。