1 . Microwaves may be great at warming up food, but what about warming people?
Using microwaves to directly heat owners of a room would save much of the energy wasted by heating walls and furniture. And despite popular ideas about microwaves, this technique would be safe, according to Charles R. Burlier of the Microwave Research Center in Marlborough, New Hampshire. Low-power microwaves only penetrate (贯穿) the skin (low-power microwave penetration in a ham is about 0.2 inches, for example) and with no negative effects.
To test this idea, Buffler subjected himself to microwaves in a special room using a standard 500-watt, 2459 MHz magnetron (磁控管). He found that a person will start to feel warmth at about 20 milliwatts per square centimeter (mw. / sq. cm. ) ; a satisfactory feeling of warmth occurs between 35 and 50mw. / sq. cm. By comparison, a person standing in noonday summer sun feels the amount of 85 mw. / sq. cm. And a frozen meat pie in your microwave oven receives about 1000 mw. / sq. cm.
In houses of the future, each room could be provided with its own magnetron, says Buffler. When you stepped into the living room, for example, a motion detector (运动感应器)would turn on the magnetron, filling the room with low-power microwaves. In the same way that a microwave oven heats up a hamburger, but not the plate it’s on, you would feel warmth from the microwaves without changing the temperature of your coffee table. (You could, however, make your favorite easy chair even more comfortable by treating it with a radiation-absorbing chemical.)
While it might be some time before homeowners are comfortable enough with the idea to set up whole-body microwave heaters in houses, Buffler says microwaves may attract livestock(家畜) farmers. Lambs that are born outdoors in winter, for example, are frequently lost to cold. Microwaves could warm the lambs safely and quickly.
1. Which of the following can tell the main idea of the passage?
2. According to Paragraph 2, which of the following does not describe the characteristics of a microwave heater?
3. The test conducted by Buffler shows that when a person feels comfortable warmth, he receives about ________________.
4. According to Paragraph 4, which of the following fills the room with low-power microwaves?
5. Which of the following statements about microwave heaters would Buffler most probably agree with?
Using microwaves to directly heat owners of a room would save much of the energy wasted by heating walls and furniture. And despite popular ideas about microwaves, this technique would be safe, according to Charles R. Burlier of the Microwave Research Center in Marlborough, New Hampshire. Low-power microwaves only penetrate (贯穿) the skin (low-power microwave penetration in a ham is about 0.2 inches, for example) and with no negative effects.
To test this idea, Buffler subjected himself to microwaves in a special room using a standard 500-watt, 2459 MHz magnetron (磁控管). He found that a person will start to feel warmth at about 20 milliwatts per square centimeter (mw. / sq. cm. ) ; a satisfactory feeling of warmth occurs between 35 and 50mw. / sq. cm. By comparison, a person standing in noonday summer sun feels the amount of 85 mw. / sq. cm. And a frozen meat pie in your microwave oven receives about 1000 mw. / sq. cm.
In houses of the future, each room could be provided with its own magnetron, says Buffler. When you stepped into the living room, for example, a motion detector (运动感应器)would turn on the magnetron, filling the room with low-power microwaves. In the same way that a microwave oven heats up a hamburger, but not the plate it’s on, you would feel warmth from the microwaves without changing the temperature of your coffee table. (You could, however, make your favorite easy chair even more comfortable by treating it with a radiation-absorbing chemical.)
While it might be some time before homeowners are comfortable enough with the idea to set up whole-body microwave heaters in houses, Buffler says microwaves may attract livestock(家畜) farmers. Lambs that are born outdoors in winter, for example, are frequently lost to cold. Microwaves could warm the lambs safely and quickly.
1. Which of the following can tell the main idea of the passage?
| A．A new heating system. | B．A new microwave oven. |
| C．A popular technique. | D．The magnetron. |
| A．It directly heats people in a room. |
| B．It heats walls and furniture in a room. |
| C．It is safe. |
| D．It saves energy. |
| A．20 mw. / sq. cm. | B．40 mw. / sq. cm. | C．60 mw. / sq. cm. | D．85 mw. / sq. cm. |
| A．The magnetron. | B．The motion detector. |
| C．The microwave oven. | D．The radiation-absorbing chemical. |
| A．Microwave heaters will soon be widely used by homeowners. |
| B．Microwave heaters sometimes make people feel uncomfortable. |
| C．Perhaps microwave heaters will be first used by livestock farmers, who wish to protect their lambs in winter. |
| D．Microwave heaters cannot be accepted by the public because they are somewhat unsafe. |
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2 . People in the United States honor their parents with two special days: Mother’s Day, on the second Sunday in May, and Father’s Day, on the third Sunday in June.
Mother’s Day was proclaimed a day for national observance by President Woodrow Wilson in 1915. Ann Jarvis from Grafton, West Virginia, had started the idea to have a day to honor mothers. She was the one who chose the second Sunday in May and also began the custom of wearing a carnation.
In 1909, Mrs. Dodd from Spokane, Washington, thought of the idea of a day to honor fathers. She wanted to honor her own father, William Smart. After her mother died, he had the responsibility of raising a family of five sons and a daughter. In 1910, the first Father’s Day was observed in Spokane. Senator Margaret Chase Smith helped to establish Father’s Day as a national commemorative day, in 1972.
These days are set aside to show love and respect for parents. They raise their children and educate them to be responsible citizens. They give love and care.
These two special days are celebrated in many different ways. On Mother’s Day people wear carnations. A red one symbolizes a living mother. A white one shows that the mother is dead．Many people attend religious services to honor parents. It is also a day when people whose parents are dead visit the cemetery. On these days families get together at home, as well as in restaurants. They often have outdoor barbecues for Father’s Day. These are days of fun and good feelings and memories.
1. According to the passage, which of the following about the second Sunday in May is not true ?
2. Choose the right time order of the following events.
a. The first Father’s Day was observed
b. Mother’s Day was proclaimed a day for national observance
c. Father’s Day became a day for national observance.
d. The idea of honoring fathers was bought up
3. Who plays the most important role in Father’s Day becoming a national commemorative day?
4. From the passage, we know in the U.S ________________.
5. The author’s purpose of writing this passage is to __________
Mother’s Day was proclaimed a day for national observance by President Woodrow Wilson in 1915. Ann Jarvis from Grafton, West Virginia, had started the idea to have a day to honor mothers. She was the one who chose the second Sunday in May and also began the custom of wearing a carnation.
In 1909, Mrs. Dodd from Spokane, Washington, thought of the idea of a day to honor fathers. She wanted to honor her own father, William Smart. After her mother died, he had the responsibility of raising a family of five sons and a daughter. In 1910, the first Father’s Day was observed in Spokane. Senator Margaret Chase Smith helped to establish Father’s Day as a national commemorative day, in 1972.
These days are set aside to show love and respect for parents. They raise their children and educate them to be responsible citizens. They give love and care.
These two special days are celebrated in many different ways. On Mother’s Day people wear carnations. A red one symbolizes a living mother. A white one shows that the mother is dead．Many people attend religious services to honor parents. It is also a day when people whose parents are dead visit the cemetery. On these days families get together at home, as well as in restaurants. They often have outdoor barbecues for Father’s Day. These are days of fun and good feelings and memories.
1. According to the passage, which of the following about the second Sunday in May is not true ?
| A．It is a day to show love to mothers |
| B．It is a day to wear carnations |
| C．It is a day for people to visit the cemetery |
| D．It is a day for many people to attend religious services |
a. The first Father’s Day was observed
b. Mother’s Day was proclaimed a day for national observance
c. Father’s Day became a day for national observance.
d. The idea of honoring fathers was bought up
| A．a b c d | B．d a b c | C．b a c d | D．d a c b |
| A．Mrs. Do | B．Margaret Chase Smith | C．Ann Jarvis | D．Woodrow Wilson |
| A．one should wear a red carnation if one’s mother pass away |
| B．on Mother’s Day, families often go out to have barbecues |
| C．on Father’s Day, people often stay at home to celebrate the special day. |
| D．The purpose to have these two special days is to show love to parents |
| A．call on people to love and respect their parents. |
| B．introduce Mother’s Day and Father’s Day. |
| C．tell the difference between Mother’s Day and Father’s Day |
| D．show how important fathers and mothers are |
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