[填空题]Each year, 225,000 cardiacs in the US died of____________.

[单项选择]Each year, more US properties within floodplains are destroyed by flooding than fire. Changing weather patterns, increased urban development, and the leveling of forests have reduced the land’s natural ability to absorb water. As flooding becomes a common occurrence, property owners need to face the facts. Flood damage can happen anytime, no matter where you live.
Flood insurance, which is financially backed by the US Government through the National Flood Insurance Program, is available through Homesite Insurance and the Homesite Insurance Agency. The National Flood Insurance Program (NFIP) through the Federal Emergency Management Agency is the primary provider of flood insurance. The Homesite Insurance Company acts as a " Write-Your-Own" company on behalf of the NFIP. "Write-Your-Own" companies sell and service flood policies and the NFIP pays the claims.
Property owners know a Homeowners policy covers fire damage, but most don’t realize that it won’t cover flood or mudslide
A. Changing weather patterns.
B. Increased urban development.
C. The jerry-built projects.
D. The leveling of forests.

[填空题]In the US each year, sudden cardiac death, caused by a heart-rhythm disturbance called ventricular fibrillation results in the deaths of ______.

[单项选择]

Most of us are used to seasons. Each year, spring follows winter, which follows autumn, which follows summer, which follows spring. And winter is colder than summer. But the earth goes through temperature cycles over much longer periods than those that we experience. Between 65,000 and 35,000 years ago, the planet was much colder than it is now. During that time the temperature also changed a lot, with periods of warming and cooling. Ice melted during the warm periods, which made sea levels rise. Water froze again during the cold periods.
(77) A new study from Switzerland sheds light on where ice sheets melted during the iceage. It now seems that the ice melted at both ends of the earth, rather than just in either northern or southern regions.
This surprised the researchers from the University of Bern. (78) Scientists have long assumed that most of the ice that melted was in the Northern hemisphere (半球) during the 30,000-year long ice age. That belie
A. most of the ice melted in the Northern hemisphere
B. most of the ice melted in the Southern hemisphere
C. The North Pole is colder than the South Pole
D. The South Pole is colder than the North Pole

[单项选择]What happens to trees each year
A. Their tings get thinner and thinner.
B. They add a ring of wood.
C. Their rings get darker in color.
D. They become more valuable.