3、Based on a telephone survey of about 72，000 people in 2005，only about l in 4 Americans knows the warning signs of a heart attack and what to do first，according to a new government report．That’s a decline from the last survey in 2001，which showed that nearly 1 in 3 were well informed．

The study’s lead author，Dr．Jing Fang，called public awareness in the new survey“alarmingly low”．Fang is with the Center for Disease Control and Prevention，which surveyed residents of 13 states and District of Columbia．

Heart attack warning signs can include one or more of the following：shortness of breath，pain or discomfort in the chest，discomfort in the arms or shoulders，a feeling of weakness or light headedness，and discomfort in the jaw，neck or back．Chest pain is the most common symptom．Women are more likely than men to experience some of the other symptoms，Particularly shortness of breath and back or jaw pain，according to the American Heart Association．Anyone experiencing these symptoms should call 911，the heart association advises．In America，the groups best informed of heart attack warning signs，and what to do，tended to be white，highly educated and women．Also scoring well were residents of West Virginia，which has Some of the nation’s highest heart attack death rates．

Each year more than 900，000 Americans suffer heart attacks，about 157，000 of them fatal（致命的）．About half the deaths occur within an hour of the symptoms appearing，experts say．Because different people experience different symptoms，it’s important to be aware of all of them，doctors say．

Of course，knowing is not the same as doing, Although most of those who got the heart attack symptoms right said they would call 911,other studies show that only about half of heart attack victims go to a hospital by ambulance, Rosamond noted．

Patients’ concerns about lack of health insurance or other matters may explain why so few went to a hospital，said Rosamond，who was not involved in the new study．

 

61．What’s the main topic of the passage?

A．People’s declining knowledge of heart attack symptoms．

B．The importance of knowing the heart attack warning signs．

C．The seriousness of heart attacks．

D．Some of the symptoms of heart attacks．

62．We learn from the passage that American women

A．suffer more chest pain from heart attacks

B．have a greater possibility to experience shortness of breath in heart attacks

C．have heart attacks more often than men

       D．having heart attacks all experience rather similar symptoms

63．Who is most likely to know the most about heart attack warning signs?

A．A white，poorly educated man                    B．A white．highly educated woman．

C．A black．highly educated woman．             D．A black high school boy．

64．Why don’t Some people who get heart attacks call 91 l?

      A．Because they don’t trust doctors in the hospital．

      B．Just because they are suffering too much to move．

      C．Partly because ambulances are not available to them．

D．Partly because they don’t have health insurance

65．What do we learn from the passage?

       A．Patients with heart disease rarely suffer chest pain．

       B．Dr．Jing Fang did the survey by himself．

C．West Virginia has the lowest heart attack death rate．

D．A person having a heart attack may have one or more symptoms．