According to the information in the third paragraph, which of the following improvements made it possible to lengthen the tone produced by the piano?()
The introduction of pedals
The use of heavy wires
The use of felt-padded hammerheads
The metal frame construction
Paragraph④_____
Soot's Role in Climate Changes Above Oceans and Land
Observations of Warming in the Northern Hemisphere
Explanation of Increased Warming Effect Caused by Soot
Black Soot in Snow and Icy Areas Leading to Climate Change
Black Soot Contributing to Global Warming
Greenhouse Gases as the Main Factor of Global Warming
Paragraph⑥_____
Soot's Role in Climate Changes Above Oceans and Land
Observations of Warming in the Northern Hemisphere
Explanation of Increased Warming Effect Caused by Soot
Black Soot in Snow and Icy Areas Leading to Climate Change
Black Soot Contributing to Global Warming
Greenhouse Gases as the Main Factor of Global Warming
Paragraph⑦_____
Soot's Role in Climate Changes Above Oceans and Land
Observations of Warming in the Northern Hemisphere
Explanation of Increased Warming Effect Caused by Soot
Black Soot in Snow and Icy Areas Leading to Climate Change
Black Soot Contributing to Global Warming
Greenhouse Gases as the Main Factor of Global Warming
In the twentieth century, soot________
produces much more global warming than a carbon-dioxide forcing of the same magnitude
contributed to 25 percent of observed global warming
winter and spring
the warming effects increase
still surpass soot warming the world's climate during the last century
can be seen mostly in the Northern Hemisphere
If snow and ice covered areas begin melting, ________
produces much more global warming than a carbon-dioxide forcing of the same magnitude
contributed to 25 percent of observed global warming
winter and spring
the warming effects increase
still surpass soot warming the world's climate during the last century
can be seen mostly in the Northern Hemisphere
A soot forcing is unusually effective, which_________
produces much more global warming than a carbon-dioxide forcing of the same magnitude
contributed to 25 percent of observed global warming
winter and spring
the warming effects increase
still surpass soot warming the world's climate during the last century
can be seen mostly in the Northern Hemisphere
Hansen cautioned that greenhouse gases________
produces much more global warming than a carbon-dioxide forcing of the same magnitude
contributed to 25 percent of observed global warming
winter and spring
the warming effects increase
still surpass soot warming the world's climate during the last century
can be seen mostly in the Northern Hemisphere
Warming in the Northern Hemisphere was large in ________ at middle and high latitudes.
produces much more global warming than a carbon-dioxide forcing of the same magnitude
contributed to 25 percent of observed global warming
winter and spring
the warming effects increase
still surpass soot warming the world's climate during the last century
can be seen mostly in the Northern Hemisphere
The Disappearing Honeybee
Do you run away when you hear a bee buzzing? Many people do. A bee sting hurts and some people are allergic to bee venom(蜂毒). But did you know that bees are very important to humans? Honeybees do more than just make honey. They fly around and pollinate(传授花粉) flowers, plants, and trees. ___11___ One third of America's food supply is pollinated by the honeybee.
Have you seen or heard a honeybee lately? Bees are mysteriously disappearing in many parts of the world. Most people don't know about this problem. It is called Colony Collapse Disorder(CCD). Some North American beekeepers lost 80% of their hives(蜂巢)from 2006-2008.___12___.
The disappearance of the honeybee is a serious problem. Can you imagine never eating another blueberry? What about almonds and cherries? Without honeybees food prices will skyrocket(猛涨).___13___.
This problem affects other foods besides fresh produce. Imagine losing your favorite ice cream! Haagen Daaz is a famous ice cream company. Many of their flavors rely on the hard working honey bee. ___14___ They also created a website called helpthehoneybee.com.
Donating money to research is the most important thing humans can do to save the honeybees. Scientists need money to investigate the causes of Colony Collapse Disorder. Some scientists blame CCD on climate change. Others think pesticides(杀虫剂)are killing the bees.___15___Beekeepers transport their hives from place to place in order to pollinate plants year round.
Not everyone has money to donate regularly. There are other ways to help the honeybee. Spread the word, by telling your friends and family about the problem. Tell your teacher about the disappearing bees too. Maybe your class can write a letter to the government.
A. In 2008 Haagen Daaz began raising money for CCD
B. It is hard to pin down what has been causing honeybees to vanish
C. The poorest people always suffer the worst when there is a lack of food
D. Our fruits, nuts, and vegetables rely on these pollinators.
E. Commercial bee migration may also cause CCD.
F. Bees in Italy and Australia are disappearing too.
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