试题与答案

野生动物保护协会研究发现:鹿是山林中常见的动物,也是山林中的弱者.鹿的警惕性很高

题型:解答题

题目:

野生动物保护协会研究发现:鹿是山林中常见的动物,也是山林中的弱者.鹿的警惕性很高,在安全的环境中,鹿的尾巴总是不停地摆动;当鹿发现“敌人”时,鹿的尾巴垂直不动,周围的鹿见此信号时,立即警觉起来,向四周眺望;一旦狼来了,鹿拔腿就跑,尾巴向上竖起,显示出自己的肛门后盾,其它鹿见到肛门后盾的信号后立即跟着逃跑.请分析回答:

(1)上述现象从功能上看属于鹿的______行为,这种行为是鹿对生存环境的适应性表现.

(2)从行为获得的途径来看,这种行为属于______( 选填“先天性行为”或“后天性行为”),它是由鹿体内的______所控制的.

(3)鹿的逃跑行为是______系统和激素协调作用的结果.

(4)“当鹿发现‘敌人’时,鹿的尾巴垂直不动,周围的鹿见此信号时,立即警觉起来,向四周眺望;一旦狼来了,鹿拔腿就跑,尾巴向上竖起,显示出自己的肛门后盾,其它鹿见到肛门后盾的信号后立即跟着逃跑”,这种现象就是生物的______.

(5)从动物的繁殖方式上看,你认为鹿属于______动物.

答案:

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参考答案:C

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Money, jewels and important documents are not the only valuable placed in banks these days. Some mothers store their breast milk in banks.

There’re ten breast banks set up across the United States, where mothers can donate their extra milk for other women’s babies. Experts say breast milk is the best food for babies. The World Health Organization says it is the only food babies should get during the first six months of life, in most cases. Breast milk is especially important for babies born too early. Sometimes these premature babies must stay in the hospital for many weeks.

James Cameron is a doctor who treats newborns at Lutheran Children’s Hospital in Fort Wayne, Indiana. He says breast milk is almost like medicine. Doctor James Cameron said, “The fact is that there are so many different proteins and specialized sugars in the breast milk that the mom’s able to make that help provide immunity. It’s very important for the health of the newborn.”

There are several reasons some mothers may not be able to breastfeed. Some are not able to produce enough milk. Others might be taking medicines or have medical problems that prevent the process.

Lucy Baur lives near Fort Wayne. She fed her milk to both her children and always had more milk than they needed. She wanted to donate to the Indiana Mothers Milk Bank in Indianapolis. But freezing and shipping milk can be costly. Then, a donor station opened near her home.

Milk donations in the United States work like this: Donors must be willing to provide almost three liters of breast milk. They freeze the milk and take it to the station. There, employees warm the milk and mix it with other mothers’ milk. Then, the milk is heated to kill bacteria. After that, the technicians test samples of all the milk to make sure it is safe and healthful. The milk is re-frozen and sent to the main milk bank. The milk bank transports the milk to hospitals to feed premature or sick babies. Donors are tested for diseases before any milk is accepted. They are not permitted to smoke tobacco, use illegal drugs or drink too much alcohol.

小题1:The purpose of setting up breast milk banks is to_____.

A.store extra fresh milk for school children

B.provide milk to children who go hungry

C.help mothers donate milk to other babies

D.offer free breast milk to premature babies小题2:The breast milk is important for newborns because_____.

A.it protects them from any possible disease

B.it contains rich nutrients that they need

C.it is the only food that babies can eat

D.it benefits them as the best medicine小题3:The underlined word “they” in the last paragraph refers to____.

A.milk bank employees

B.milk bank doctors

C.milk bank nurses

D.breast milk donors小题4:Which of the following shows the process of milk donations in the USA?

a. The mixed breast milk is heated to kill bacteria.

b. Breast milk is donated by mothers, frozen by them and sent to the stations.

c. The breast milk samples are tested for safety reason.

d. Different donors’ breast milk is warmed and mixed together by the station.

e. The milk is frozen again and sent to the main milk bank.

A.bdace

B.bcdea

C.badec

D.cbaed

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