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B
What weighs 3500 pounds(1600kg)and lived 60 million years ago?Are you thinking of
dinosaurs?Guess again!You don,t have to go to a museum to see these creatures．They are alive
and swimming in the warm coastal waters of Florida．
Manatees(海牛)have lived a peaceful existence in the warm waters of Florida for 60
million years．However，they are now an endangered species．This means that if humans don,t do
something to save them，they will soon go the way of dinosaurs．
Humans have made life very difficult for manatees．One big danger that humans have
introduced is the speedboat．Because manatees are mammals．they need to come to the surface to breathe about every 5 to 6 minutes．This means that they are in constant danger of being caught in the propellers(螺旋桨)of speedboats．And boating aceidents are the greatest cause of death for them．
Manatees are in extra danger when they are in their sleeping or“torpor”state．They still
have to come to the surface for the air，but sometimes they are too sleepy to avoid the danger of approaching boats．
Another danger for manatees is the pollution that humans produce．Due to human pollution，
a deadly plant called red tide had increased greatly in the Gulf of Mexico．The plant，or algae，
t11riVes(繁茂)on pollution．It wiped out nearly 20 percent of the total manatee population on
earth．
Humans can help to save manatees。The government has established boating speed limits to
give the manatees．a chance to escape approaching speedlsoats．Everyone can help by cutting
down on waste and pollution to protect the waters for the manatees．
One famous singer，Jimmy Buffet，has helped save the manatees．He co-founded the Save the Manatee Club(SMC)．SMC had begun an adoption(收养)program for the manatees．For a fee，sponsors(资助者)can name a manatee．Donations are used to help protect the manatees and their habitat．
45．The manatee is the kind of animal that___________．
A．1ikes living in the cold waters of Florida B．will die out if not protected in time
C．call dive in the deep sea for hours D．is the biggest living animal on earth
46．Why is it dangerous for manatees to be in a torpor state?
A．Because they come to the snlface to breathe，and that is when they are hunted．
B．Because they eat deadly algae，and this makes them too sick to avoid danger．
C．Because they live in groups and therefore they are easily hurt by passing boats．
D．Because they are sleepy when they surface，so they can,t avoid approaching boats．
47．The death of the manatees is largely due to__________．
A．human hunting B．human pollution
C．speedboat accidents D．deadly plants
48．To help protect manatees，people should_________．
A．never go speed boating in their living habitat
B．keep the waters of Florida free from pollution
C．have manatess named by sponsors without a fee
D．wake manatees up from their torpor state
D
When Mary Moore began her high school in 1951, her mother told her, "Be sure and take a typing course so when this show business thing doesn't work out, you'll have something to rely on." Mary responded in typical teenage fashion. From that moment on, "the very last thing I ever thought about doing was taking a typing course," she recalls.
The show business thing worked out, of course. In her career, Mary won many awards. Only recently, when she began to write Growing Up Again, did she regret ignoring her mom," I don't know how to use a computer," she admits.
Unlike her 1995 autobiography, After All, her second book is less about life as an award-winning actress and more about living with diabetes (糖尿病). All the money from the book is intended for the Juvenile Diabetes Research Foundation (JDRF), an organization she serves as international chairman. "I felt there was a need for a book like this," she says." I didn't want to lecture, but I wanted other diabetics to know that things get better when we're self-controlled and do our part in managing the disease."
But she hasn't always practiced what she teaches. In her book, she describes that awful day, almost 40 years ago, when she received two pieces of life-changing news. First, she had lost the baby she was carrying, and second, tests showed that she had diabetes. In a childlike act, she left the hospital and treated herself to a box of doughnuts (甜甜圈). Years would pass before she realized she had to grow up ---again---and take control of her diabetes, not let it control her. Only then did she kick her three-pack-a-day cigarette habit, overcome her addiction to alcohol, and begin to follow a balanced diet.
Although her disease has affected her eyesight and forced her to the sidelines of the dance floor, she refuses to fall into self-pity. "Everybody on earth can ask, 'why me?' about something or other," she insists. "It doesn't do any good. No one is immune (免疫的) to heartache, pain, and disappointments. Sometimes we can make things better by helping others. I've come to realize the importance of that as I've grown up this second time. I want to speak out and be as helpful as I can be."
1.We can know that before 1995 Mary ___________.
A．had two books published
B．received many career awards
C．knew how to use a computer
D．supported the JDRF by writing
2.Mary's second book Growing Up Again is mainly about her _________.
A．living with diabetes
B．successful show business
C．service for an organization
D．remembrance of her mother
3.When Mary received the life-changing news, she __________ .
A．lost control of herself B．began a balanced diet
C．meant to get a treatment D．behaved in an adult way
4.What can we know from the last paragraph?
A．Mary feels pity for herself.
B．Mary has recovered from her disease.
C．Mary wants to help others as much as possible.
D．Mary determines to go back to the dance floor.
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B
What weighs 3500 pounds(1600kg)and lived 60 million years ago?Are you thinking of
dinosaurs?Guess again!You don,t have to go to a museum to see these creatures．They are alive
and swimming in the warm coastal waters of Florida．
Manatees(海牛)have lived a peaceful existence in the warm waters of Florida for 60
million years．However，they are now an endangered species．This means that if humans don,t do
something to save them，they will soon go the way of dinosaurs．
Humans have made life very difficult for manatees．One big danger that humans have
introduced is the speedboat．Because manatees are mammals．they need to come to the surface to breathe about every 5 to 6 minutes．This means that they are in constant danger of being caught in the propellers(螺旋桨)of speedboats．And boating aceidents are the greatest cause of death for them．
Manatees are in extra danger when they are in their sleeping or“torpor”state．They still
have to come to the surface for the air，but sometimes they are too sleepy to avoid the danger of approaching boats．
Another danger for manatees is the pollution that humans produce．Due to human pollution，
a deadly plant called red tide had increased greatly in the Gulf of Mexico．The plant，or algae，
t11riVes(繁茂)on pollution．It wiped out nearly 20 percent of the total manatee population on
earth．
Humans can help to save manatees。The government has established boating speed limits to
give the manatees．a chance to escape approaching speedlsoats．Everyone can help by cutting
down on waste and pollution to protect the waters for the manatees．
One famous singer，Jimmy Buffet，has helped save the manatees．He co-founded the Save the Manatee Club(SMC)．SMC had begun an adoption(收养)program for the manatees．For a fee，sponsors(资助者)can name a manatee．Donations are used to help protect the manatees and their habitat．
45．The manatee is the kind of animal that___________．
A．1ikes living in the cold waters of Florida B．will die out if not protected in time
C．call dive in the deep sea for hours D．is the biggest living animal on earth
46．Why is it dangerous for manatees to be in a torpor state?
A．Because they come to the snlface to breathe，and that is when they are hunted．
B．Because they eat deadly algae，and this makes them too sick to avoid danger．
C．Because they live in groups and therefore they are easily hurt by passing boats．
D．Because they are sleepy when they surface，so they can,t avoid approaching boats．
47．The death of the manatees is largely due to__________．
A．human hunting B．human pollution
C．speedboat accidents D．deadly plants
48．To help protect manatees，people should_________．
A．never go speed boating in their living habitat
B．keep the waters of Florida free from pollution
C．have manatess named by sponsors without a fee
D．wake manatees up from their torpor state
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B
What weighs 3500 pounds(1600kg)and lived 60 million years ago?Are you thinking of
dinosaurs?Guess again!You don,t have to go to a museum to see these creatures．They are alive
and swimming in the warm coastal waters of Florida．
Manatees(海牛)have lived a peaceful existence in the warm waters of Florida for 60
million years．However，they are now an endangered species．This means that if humans don,t do
something to save them，they will soon go the way of dinosaurs．
Humans have made life very difficult for manatees．One big danger that humans have
introduced is the speedboat．Because manatees are mammals．they need to come to the surface to breathe about every 5 to 6 minutes．This means that they are in constant danger of being caught in the propellers(螺旋桨)of speedboats．And boating aceidents are the greatest cause of death for them．
Manatees are in extra danger when they are in their sleeping or“torpor”state．They still
have to come to the surface for the air，but sometimes they are too sleepy to avoid the danger of approaching boats．
Another danger for manatees is the pollution that humans produce．Due to human pollution，
a deadly plant called red tide had increased greatly in the Gulf of Mexico．The plant，or algae，
t11riVes(繁茂)on pollution．It wiped out nearly 20 percent of the total manatee population on
earth．
Humans can help to save manatees。The government has established boating speed limits to
give the manatees．a chance to escape approaching speedlsoats．Everyone can help by cutting
down on waste and pollution to protect the waters for the manatees．
One famous singer，Jimmy Buffet，has helped save the manatees．He co-founded the Save the Manatee Club(SMC)．SMC had begun an adoption(收养)program for the manatees．For a fee，sponsors(资助者)can name a manatee．Donations are used to help protect the manatees and their habitat．
45．The manatee is the kind of animal that___________．
A．1ikes living in the cold waters of Florida B．will die out if not protected in time
C．call dive in the deep sea for hours D．is the biggest living animal on earth
46．Why is it dangerous for manatees to be in a torpor state?
A．Because they come to the snlface to breathe，and that is when they are hunted．
B．Because they eat deadly algae，and this makes them too sick to avoid danger．
C．Because they live in groups and therefore they are easily hurt by passing boats．
D．Because they are sleepy when they surface，so they can,t avoid approaching boats．
47．The death of the manatees is largely due to__________．
A．human hunting B．human pollution
C．speedboat accidents D．deadly plants
48．To help protect manatees，people should_________．
A．never go speed boating in their living habitat
B．keep the waters of Florida free from pollution
C．have manatess named by sponsors without a fee
D．wake manatees up from their torpor state
查看习题详情和答案>>C
Why do men die earlier than women? The latest research makes it known that the reason could be that men’s hearts go into rapid decline when they reach middle age.
The largest study of the effects of ageing on the heart has found that women’s longevity may be linked to the fact that their hearts do not lose their pumping power with age.
“We have found that the power of the male heart falls by 20-25 percent between 18 and 70 years of age,” said the head of the study, David Goldspink of Liverpool John Moores University in the UK.
“Within the heart there are millions of cells that enable it to beat. Between the age of 20 and 70, one-third of those cells die and are not replaced in men,” said Goldspink. “This is part of the ageing process.”
What surprises scientists is that the female heart sees very little loss of these cells. A healthy 70-year-old woman’s heart could perform almost as well as a 20-year-old one’s.
“This gender difference might just explain why women live longer than men,” said Goldspink. They studied more than 250 healthy men and women between the ages of 18 and 80, focusing on healthy persons to remove the confusing influence of disease. “The team has yet to find why ageing takes a greater loss on the male heart,” said Goldspink.
The good news is that men can improve the health of their heart with regular exercise. Goldspink stressed that women also need regular exercise to prevent their leg muscles becoming smaller and weaker as they age.
69. The underlined word “longevity” in the second paragraph probably refers to “________”.
A. health B. long life C. ageing D. effect
70. The text mainly talks about ________.
A. men’s heart cells B. women’s ageing process
C. the gender difference D. hearts and long life
71. According to the text, the UK scientists have known that ________.
A. women have more cells than men when they are born
B. women can replace the cells that enable the heart to beat
C. the female heart loses few of the cells with age
D. women never lose their pumping power with age
72. If you want to live longer, you should ________.
A. enable your heart to beat much faster
B. find out the reason for ageing
C. exercise regularly to keep your heart healthy
D. prevent your cells from being lost
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