题目内容
（请给出正确答案）
Every possible means ______ to prevent the air pollution, but the sky is still not clear.
A) is used B) are used C) has been used D) have been used
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更多“Every possible means ______ to…”相关的问题
A.A.is used
B.B.are used
C.C.has been used
D.D.have been used
A.change
B.action
C.measure
D.advantage
For most people,learning a foreign language does not come easy,for it requires hard work and consistency. ____1 and foremost,there must be some motivations for learning a language.Are you planning to head to a foreign destination？ Is learning a language on your wish list？ Is it important for job advancement？ ____2 any measure,the critical success factor is how much time you are taking to involve yourself ___3 the language.The more time you dedicate ____4 the language,the quicker you will learn.So,what does spending time really mean？ It means listening,reading,writing,speaking,and studying words and phrases at every available opportunity.Involve as many senses _____5 possible in the learning process.
A.simulate
B.stimulate
C.signify
D.smuggle
Population tends to grow at an exponential(指数的)rate. This means that they progressively double. As an example of this type of growth rate take one penny and double every day for one month. After the first week, you would have only 64 cent, but after the fourth week you would have over a million dollars.
This helps explain why the population has come on“all of a sudden” took from he beginning of human 1ife to the year 1830 for the population of the earth to reach one billion. That repents(缓慢进行) a time span of at least two million years. Then it took from 1830 to 1930 for world population to reach 2 billion. The next billion was added by 1960 only thirty years and in 1975 world population reached 4 billion which is another billion people in only fifteen years.
World population is increasing at a rate of 9, 000per hour, 220,000 per day and 80 million per year.
This is not only due to higher birth rate, but to lower death rate as well. The number of births has not declined at the same rate as the number of deaths.
Some countries such as Columbia, Thailand, Morocco, Costa Rica and the Philippines are doubling their population about every twenty-one years with a growth rate of 3.3 percent a year or more. The United States is doubling its population about very eighty-seven years, with a rate of 0.8 percent per year.Every time a population doubles, the country involved needs twice as much of everything, including hospitals, schools, resources, food and medicines to care for its people. It is easy to see that this is very difficult to achieve for the more rapidly growing countries.
This passage chiefly discusses
A.the growth of world population.
B.one type of the exponential rate
C.the population problem of more rapidly growing countries.
D.the possible ways of dealing with the rapid population growth
According to the passage what helps to explain why the population problem has come on “all of a sudden”？A.The penny that doubles itself every day for one month
B.The time span of at 1east two million years in human history.
C.An illustration of the exponent growth rate given by the author.
D.The large amount of money you would luckily make after the fourth week
Which of the following statements is NOT true？A.World population is increasing at a rate of 150 per minute
B.Lower death rate also contributes to world population growth
C.The population of Columbia has been doubling every year for 21 years.
D.The United States is usually doubling its population on about every 87 years.
It took ______ for the world to increase its population from 1 billion to 4 billion.A.100 years
B.175 years
C.1975 years
D.over two million years
When a population doubles, the country involved needs twice as much of everything including __.A.hospitals and medicines
B.schools and students
C.food and manpower resources
D.all of the above
请帮忙给出每个问题的正确答案和分析，谢谢！
根据内容回答题.
Sleeplessness
Insomnia or sleeplessness is a common complaint of women as they enter into menopause. Insomnia means having trouble falliig asleep or staying asleep or the feeling that your sleep was not adequate for you. For women who are having night sweats, their sleep is broken by frequent a-wakening and therefore not refreshing. Generally once the night sweats are controlled a normal sleep pattern returns. If it doesn&39;t it may be, or have become chronic insomnia. How do you know？
If you suffer from insomnia every night or most nights for a period of one month then you have chronic insomnia. If you&39;re not having night sweats then it&39;s time to look for other causes of sleeplessness. Depression and anxiety disorders are the most common causes of chronic insomnia.
If you feel depressed you need to be checked by a qualified health care provider. Movement disorders such as restless leg syndrome are second on the list of insomnia for them, there are new medicines that may help. Other common causes are shift working, and pain.
In up to 30% of people with chronic insomnia no cause can be identified. Medical treatment of these people has generally been with sleeping pills. It is estimated that 25% of the adult population in America took some type of medicines for sleep last year. It is generally agreed that sleep- ing pills should only be in the lowest dose and for the shortest possible time.
Sleep hygiene is directed at changing bad sleep habits. The recommendations are: -Go to bed only when sleepy.Do not wait up to a specified time. -Avoid caffeine and alcohol in the evening, etc.
The word "insomnia" in the first paragraph means ________. 查看材料
A.having a normal sleep pattern
B.having no sweats at night
C.feeling that one"s sleep is adequate for him
D.having trouble falling or staying asleep
A．to sell the largest possible amount of goods
B．to make the goods as attractive as possible
C．to produce the goods as efficiently as possible
D．to focus greatly on the needs of the consumers
The word "authorize" in Paragraph 2 means "______".
A．make way for
B．give power to
C．write an order for
D．make it possible for
Every means of communications between here and outside ______ (be)interrupted．
