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The use of sinking and dispersing chemical agents for removal of surface oil is ______.
A.the most common method used in the United States
B.too expensive for common use
C.generally safe to sea life
D.authorized only with prior approval of the Federal On-Scene Coordinator
答案
更多“The use of sinking and dispersing chemical agents for removal of surface oil is ______.A.t”相关的问题
第1题
Sharks can stop themselves from sinking because ______.
A．their dorsal fins are very valuable
B．they have a swim bladder
C．they have fins for swimming
D．they have skeletons made of cartilage
第2题
A.7
B.9
C.8
D.10
第3题
A.in order to help her
B.in order to save her
C.in order to utilize her
D.in order to comfort her
第4题
Which of the following provides the most flexibility for the bond issuer？
A. Put provision
B. Call provision
C. Sinking fund provision
第5题
A.discouraging
B.disastrous
C.disgraceful
D.destructive
第6题
A.I must abandon my vessel
B.I require immediate assistance
C.I am sinking
D.I am in distress and require immediate assistance
第7题
中值相对较小的数据会像水中的气泡一样逐渐上升到数组的最顶端，与此同时，较大的数据逐渐地下沉到数组的底部。这个处理过程需要在整个数组范围内反复执行多遍。每一遍执行时，比较相邻的两个元素，若顺序不对，则将其位置交换，当没有数据需要交换时， 数据也就排好序了。编程将排序函数DataSort() 改用冒泡法实现。
第8题
Will We Run Out of Water？
Picture a "ghost ship" sinking into the sand, left to rot on dry land by a receding sea. Then imagine dust storms sweeping up toxic pesticides and chemical fertilizers from the dry seabed and spewing them across towns and villages.
Seem like a scene from a movie about the end of the world？ For people living near the Aral sea (咸海) in Central Asia, it's all too real. Thirty years ago, government planners diverted the rivers that flow into the sea in order to irrigate (provide water for) farmland. As a result, the sea has shrunk to half its original size, stranding (使搁浅) ships on dry land. The seawater has tripled in salt content and become polluted, killing all 24 native species offish.
Similar largecale efforts to redirect water in other parts of the world have also ended in ecological crisis, according to numerous environmental groups. But many countries continue to build massive dams and irrigation systems, even though such projects can create more problems than they fix. Why？ People in many parts of the world are desperate for water, and more people will need more water in the next century.
"Growing populations will worsen problems with water," says Peter H. Gleick, an environmental scientist at the Pacific Institute for studies in Development, Environment, and Security, a research organization in California. He fears that by the year 2025, as many as one-third of the world's projected (预测的) 8.3 billion people will suffer from water shortages.
WHERE WATER GOES
Only 2.5 percent of all water on Earth is freshwater, water suitable for drinking and growing food, says Sandra Postel, director of the Global Water Policy Project in Amherst, Mass. Two-thirds of this freshwater is locked in glaciers (冰山) and ice caps (冰盖). In fact, only a tiny percentage of freshwater is part of the water cycle, in which water evaporates and rises into the atmosphere, then condenses and falls back to Earth as precipitation (rain or snow).
Some precipitation runs off land to lakes and oceans, and some becomes groundwater, water that seeps into the earth. Much of this renewable freshwater ends up in remote places like the Amazon river basin in Brazil, where few people live, In fact, the world's population has access to only 12,500 cubic kilometers of freshwater—about the amount of water in Lake Superior(苏必利尔湖). And people use half of this amount already. "If water demand continues to climb rapidly," says Postel, "there will be severe shortages and damage to the aquatic (水的) environment."
CLOSE TO HOME
Water woes(灾难) may seem remote to people living in rich countries like the United States. But Americans could face serious water shortages, too especially in areas that rely on groundwater. Groundwater accumulates in aquifers (地下蓄水层), layers of sand and gravel that lie between soil and bedrock. (For every liter of surface water, more than 90 liters are hidden underground.) Although the United States has large aquifers, farmers, ranchers, and cities are tapping many of them for water faster than nature can replenish(补充) it. In northwest Texas, for example, overpumping has shrunk groundwater supplies by 25 percent, according to Postel.
Americans may face even more urgent problems from pollution. Drinking water in the United States is generally safe and meets high standards. Nevertheless, one in five Americans every day unknowingly drinks tap water contaminated with bacteria and chemical wastes, according to the Environmental Protection Agency. In Milwaukee, 400,000 people fell iii in 1993 after drinking tap water tainted with cryptosporidium (隐孢子虫), a microbe (微生物) that causes fever, diarrhea (腹泻) and vomiting.
THE SOURCE
Where so contaminants come from？ In developing countries, people dump raw (未经处理的) sewage(污水) into the same streams and rivers from which they draw water for drinking and co
A．Y
B．N
C．NG
第9题
It was the worst tragedy in maritime history, six times more deadly than the Titanic.
When the German cruise ship Wilhelm Gustloff was hit by torpedoes fired from a Russian submarine in the final winter of World War Ⅱ, more than 10,000 people--mostly women, children and old people fleeing the final Red Army push into Nazi Germany--were packed aboard. An ice storm had turned the decks into frozen sheets that sent hundreds of families sliding into the sea as the ship tilted and began to go down. Others desperately tried to put lifeboats down. Some who succeeded fought off those in the water who had the strength to try to claw their way aboard. Most people froze immediately. "I'll never forget the screams," says Christa Ntitzmann, 87, one of the 1,200 survivors. She recalls watching the ship, brightly lit, slipping into its dark grave—and into seeming nothingness, rarely mentioned for more than half a century.
Now Germany's Nobel Prize-winning author Guenter Grass has revived the memory of the 9,000 dead, including more than 4,000 children--with his latest novel Crab Walk, published last month. The book, which will be out in English next year, doesn't dwell on the sinking; its heroine is a pregnant young woman who survives the catastrophe only to say later. "Nobody wanted to hear about it, not here in the West (of Germany) and not at all in the East. " The reason was obvious. As Grass put it in a recent interview with the weekly Die Woche: "Because the crimes we Germans are responsible for were and are so dominant, we didn't have the energy left to tell of our own sufferings. "
The long silence about the sinking of the Wilhelm Gustloff was probably unavoidable--and necessary. By unreservedly owning up to their country's monstrous crimes in the Second World War, Germans have managed to win acceptance abroad, marginalize the neo-Nazis at home and make peace with their neighbors. Today's unified Germany is more prosperous and stable than at any time in its long, troubled history. For that, a half century of willful forgetting about painful memories like the German Titanic was perhaps a reasonable price to pay. But even the most politically correct Germans believe that they've now earned the right to discuss the full historical record. Not to equate German suffering with that of its victims, but simply to acknowledge a terrible tragedy.
Why does the author say the sinking of the Wilhelm Gustloff was the worst tragedy in maritime history？ ______
A．It was attacked by Russian torpedoes.
B．Most of its passengers were frozen to death.
C．Its victims were mostly women and children.
D．It caused the largest number of casualties.
第10题
Kohout immediately called to Graham’s wife, Evelyn, to telephone 911. Then he ran back to his house to get Terence Reif and Glenn Fajardo to help,who were at work inside the house. “There was no time for second thoughts,” said Reif，a farmer’ s son. “The only thing to do was to get in the pool.”
The car doors were locked. Graham,73, was unconscious (失去知觉)，and his Mercury was rapidly filling with water. Reif struggled to break the driver’ s side window with a hammer but had trouble getting it done underwater.
Finally—some four minutes after the car had fallen into the pool—the glass was broken. By then，Graham was floating at the top of the flooded passenger compartment (车厢).
The three men pulled Graham out through the broken glass. He wasn’ t breathing and his heart stopped beating,so they performed mouth-to-mouth resuscitation. The rescue(急救)team arrived in no time. Doctors supplied him with advanced life support on the way to the hospital.
“ These people were getting to Graham through the glass，’’ said Dr. Jeff Messinger. “ All three acted without regard for their own safety. ’’Added Evelyn Graham，“They were truly angels(天使)watching over us.” Immediately after Robert found the car sinking into the pool, he ____.
A.jumped into the pool
B.shouted to let Evelyn call the rescue team
C.ran to the nearest telephone
D.rushed into Graham’s house to find his wife
What does the word “resuscitation” refer to in the story？A.A way of saving people who have stopped breathing
B.A way of helping people who have heart trouble
C.A way of saving people who have got drunk
D.A way of helping people who need water
Which of the following would be the best title for this story？A.The Underwater Gar.
B.Angels around Us.
C.Rescue Team in Time
D.Safety First.
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