更多"The density of water is less than t"的相关试题:
[填空题]Evaporation from sea water is about 5% less than from fresh water, _________________________(当其他所有条件都相同时).
[填空题]Humanity uses a little less than half the water available worldwide.
Yet occurrences of shortages and droughts are causing famine in some
but industrial and agricultural by-products are polluting water supplies. (1) _____
Since the world’s population is expecting to double in the next 50 years, (2) _____
many experts think we are on the edge of a widespread water crisis.
But that doesn’t have to be the outcome. Water shortages do not
have to trouble the world—if we started valuing water more than we (3) _____
have in the past. Just like we began to appreciate petroleum more after (4) _____
the 1970s oil crisis, today we must start looking at water from a fresh
economical perspective. We can no longer afford to consider water a (5) _____
virtual free resource of which we can use as much as we like. (6) _____
Instead, for all uses except the domestic demand of the poor,
governments should price water to refle
[简答题]{{I}}Your composition should be no less than 120 words. Remember to write it neatly.{{/I}}
假设你是李文,请你就学校假期的安排给教育部部长写一封信,向他建议将学校传统的长假调整为几次短假并陈述相关的原因,比如:学习时间过长可能引起过度疲劳,而放假过长则可能导致浪费时间等等。
[单项选择]More than 80 percent of US adults have a less than 10 - percent risk of developing heart disease in the next 10 years, according to a report in the Journal of the American College of Cardiology. Just 3 percent have a risk that exceeds 20 percent.
Only 3 percent of US adults have a more than 10 percent 10 year risk of heart disease.
A. Right
B. Wrong
C. Not mentioned
[填空题]Mr Zidane earns less than Michael Jordan.
[单项选择]How many positive integers less than 20 are equal to the sum of a positive multiple of 3and a positive multiple of 4
A. Two
B. Five
C. Seven
D. Ten
E. Nineteen
[单项选择]The world’s rainforests cover less than ten percent of the earth’s surface, but contain over forty percent of all plant and animal species. The biggest rainforest is in South America, it’s called the Amazon.
Amazon is by far the largest remaining rainforest area left on our planet. It’s about 6 to 7 million square kilometers. It’s about two-thirds the size of the United States including Alaska. It’s enormous. Sixty percent of it is in Brazil, but the rainforest also extends into Bolivia, Peru, Ecuador, Colombia, Venezuela, French Guiana and Surinam. And amazingly each year the Amazon provides twenty percent of the world’s fresh water. Here you can find at least 60-70 thousand plant species and at least 3 thousand species of fresh water fish. And more monkeys than you find anywhere else on earth. In Brazil alone nine new species of monkeys have been identified over the last year.
But many of those species, known and unknown, are destroyed every day. Moreover, constant logging,
A. Eight.
B. Nine.
C. Ten.
D. Eleven.