问题 选择题

下列不能体现出生物与环境相适应的是(  )

A.人到高原出现高原反应

B.竹节虫形似竹节

C.北极狐的体色接近白色

D.草蜥遇到敌害自动断尾

答案

生物必须适应环境才能生存,如沙漠上的植物必须耐旱才能生存.

A、在海拔4000米以上的高原、高山空气稀薄、氧气含量较少,因此导致人体血液中氧合血红蛋白含量少,血液运输的氧气减少,组织细胞缺氧,氧化分解有机物释放的能量减少,因此出现高原反应.体现了环境对生物的影响.故符合题意;

B、竹节虫的拟态,是为了与环境颜色一致,不易被敌害发现,是生物对环境的一种适应.故不符合题意;

C、北极狐的体色接近白色与环境颜色一致,不易被敌害发现,有利于避敌和捕食,是生物对环境的一种适应,故不符合题意;

D、蜥蜴遇到敌害后,会主动断尾吸引敌人注意,掩护自己伺机逃脱,避免伤害.体现了生物对环境的适应,故不符合题意.

故选:A.

阅读理解

Fun is, in fact, a word heard far more frequently in families today than in the past, when "duty’’ and "responsibility" were often the words used.

Parents today are more youthful in appearance and attitudes. Their clothes and hair-styles are more casual, helping to bridge the divide. Those who are athletically inclined also enjoy Rollerblading, snowboarding, and rock-climbing with their children.

For the past three years, Kathy and Phil Dalby have spent at least one evening a week at a climbing gym with their three children. "It’s great to be able to work together," Mrs Dalby says. "We discuss various climbs and where the hard parts are. Sometimes that leads to other Conversations. We’re definitely closer."

A popular movement of parent effectiveness training in the 1970s has helped to reshape generational roles. The philosophy encourages children to describe their feelings about various situations. As a result, says Robert Billingham, a family-studies professor at Indiana University, "Parents and children began talking to each other in ways they had not before."

On the plus side, he adds, these conversations made parents realize that children may have important thoughts or feelings that adults need to be aware of.

But Professor Billingham also sees a downside: Many parents started making decisions based on what their child wanted. "The power shifted to children. Parents said, ’I have to focus on making my child happy’, as opposed to ’I have to act as a parent most appropriately’."

Other changes are occurring as the ranks of working mothers grow.  Time-short parents encourage children’s independence, making them more responsible for themselves. "They’ll say, ’We trust you to make the right decisions’ (whether they’re ready to assume the responsibility or not) ,"says Billingham.

The self-esteem movement of the past quarter-century has also affected the family dynamics (原动力). Some parents worry that if they tell their child no, it will hurt the child’s self-esteem.

小题1:What’s the trend in parent-child relationship mentioned in the passage?

A.Parents are chasing after fashion and ignoring the feelings of their children.

B.More parents and children are sharing the same enthusiasm for a certain sport.

C.Parents are taking more responsibility and setting more limits for their children.

D.The generation gap is narrowing and parents are respecting their children’s thoughts more.小题2:Which of the following has NOT contributed to the change in the parent-child relationship?

A.Younger parents.

B.Parent effectiveness training.

C.More working mothers.

D.The self-esteem movement.小题3: What’s Billingham’s attitude towards parents who make children more responsible for themselves?

A.He supports them.

B.He admires them.

C.He disagrees with them.

D.He thinks they’re unreasonable.小题4:What will probably be discussed following the last paragraph?

A.The effect of more working mothers on children’ s education.

B.The benefits of the new relationship between parents and children.

C.The importance of self-esteem and ways to develop children’s self-esteem.

D.The risks of setting no rules and some suggestions on how to have a balanced attitude.小题5:What’s the best title for the text?

A.Parents and Children as Friends.

B.Parents and Professors as Debaters.

C.Growing Mutual Understanding.

D.Disappearing Responsibility.

名词解释