The contract between the two nations for several decades ________ each other’s existence．
A．knew a great deal in
B．is equipped with
C．is available in
D．led to awareness of
新课标快乐提优暑假作业陕西旅游出版社系列答案
暑假衔接培优教材浙江工商大学出版社系列答案科目：高中英语 来源：学习高手必修三英语北师版 北师版 题型：022
阅读短文，为每段话选择中心意思
词汇预约：alien(性质不同的，陌生的) outmoded(过时的，老式的) habitat(生境，栖息地) shunned(避开，回避) bacteria(细菌)vertebrate(脊椎动物，有椎骨的)
选择阅览：
A．After habitat destruction, the biggest threat to biodiversity is invasion by alien species．
B．More species will mean fewer medicine．
C．At high latitudes, entire forest type are expected to disappear, to be replaced by new ones．
D．Even if we stop killing species today, nobody reading this will see wildlife restored to its former glory．
E．Biodiversity is good for humans．
F．The romantic notion of “wilderness” is fast becoming outmoded．
正文阅读
1．________
Scientists found that human activity has displaced the natural habitat over two-thirds of the habitable surface of the planet．Much of the undisturbed land is merely rock, ice and blowing sand, already shunned by wildlife．
2．________
These have arrived mainly through trade, tourism and biocontrol, invasive plant species already cover 400 000 square kilometers of the US, and are spreading at 12 000 square kilometers a year．At that rate, the whole of the US will fall to outside species within 750 years．
3．________
By destroying it, we could bring the axe down on our own heads．Rural communities in more than 60 countries get much of their neat from wild animals．Overpopulation, famine and the spread of high-powered weapons are killing off these creatures．
4．________
Three-quarters of the top 150 prescription drugs in the US are lab versions of chemicals found plants, fungi, bacteria and vertebrates．The WHO estimates that more than 60 per cent of the world population relation relies on plants for primary healthcare．There are 3000 plant species used in birth contra lone．
5．________
The dent already made in biodiversity will take 10 million years to repair itself．
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科目：高中英语 来源：北京市海淀区2007－2008学年度高三年级第一学期期中练习、英语试题 题型：050
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科目：高中英语 来源： 题型：阅读理解
The Hidden Health Issue: Emotional Well-Being
The Lucile Packard Foundation for Children’s Health has just released the results from the second annual Bay Annual Parent Poll, a telephone survey of nearly 1,800 parents from Alameda, Contra Costa, Marin, San Francisco. San Mateo, and Santa Clara counties in California.
For the second year in a row. Bay Area parents have put their children’s emotional health at the top of their worry list, highlighting a health risk not usually discussed. Parents across economic, ethnic, and geographic lines say that they worry about stress, depression, weight, and the impact of family stress on their kids.
Stress and Depression
About 65% of the parents of teenagers say their children experience stress from schoolwork, pressure to compete in school, divorce and family finances. In addition, 25% of the parents worry that their children might be depressed. Comparatively, less than 10% of the parents of the teens are concerned about their children smoking cigarettes, using alcohol or smoking marijuana.
Other Results
Family Time: More than 25% of the parents say they do not spend enough time together as a family.
Media: More than 45% of the parents way that the media have a negative effect on their teens.
It is clear from the results of this survey that parents of older teens are more worried about their emotional health, and I would guess that part of this finding reflects parents not feeling “connected” to their teens. We know that stress and depression are predictors for teens participating in many unhealthy behaviors, including drinking and smoking.
Not only do these results call for schools and health care to regularly assess the emotional well-being of teens, it is also a wake-up call for parents to “engage” with both the health care and educational systems to support changes to reduce the stress our youth are feeling.
1．What is the greatest stress for the Bay Area Children in the parents’ opinions?
A．Activities like sports, music, arts.
B．Difficulties with family members.
C．Pressure to compete in school.
D．Homework and schoolwork.
2．According to the survey, parents worry most about their kids’ .
A．unhealthy behaviors B．emotional health
C．physical health D．school lessons
3．How many parents think that the media have a bad effect on their teens?
A．One out of ten. B．Over a quarter.
C．Nearly a half. D．About two thirds.
4．We can conclude from the results of the survey that .
A．children’s health risk should be highlighted
B．parents should help to reduce children’s stress
C．educational systems should be completely changed
D．parents should prevent their children from bad behaviors
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