题目内容
Which animal has the fastest snapping jaw (突然合住的颚)? If you’re guessing a shark or perhaps a larger animal, you’ll have to think smaller. The trap-jaw ant, which lives in Central and South America, moves its mouth parts at 35 to 63 meters per second. Another way to think about this is that the ant’s jaws close at 125 to 233 kilometers per hour. That’s 2,300 times faster than the blink of an eye.
Scientists were able to measure the amazing jaw speed using high-speed video techniques. Sheila Patek, a biologist, says the key is that the jaws have a springy (有弹性的) system, which is critical in getting explosive (爆发性的) speeds.
Consider a bow and arrow. If you try to throw an arrow with your arm, it won’t go very far. If you use a bow, elastic energy stored in the bow is freed almost immediately when you let go of the arrow with your finger. That’s exactly what really fast organisms are doing.
Maybe even more amazing than how fast these ants grab food or even enemies is how they use this same energy to move. As the ant closes its jaws, it uses them to push off the ground — all faster than the eye can see without slow motion video. A snap of the jaw can send an ant up to 8.3 centimeters into the air. That’s like someone who is 1.7 meters jumping 13 meters high! Not only can they quickly escape from enemies, but often a group of ants will start jumping all at once. It would be hard for their enemies to grab just one.
72. The fast speed of the trap-jaw ants’ jaws lies in ______.
A. their light bodies B. their springy systems
C. their living environment D. the length of their jaws
73. What does the passage use “a bow and arrow” as an example to show?
A. How an arrow gets so much energy to fly. B. Why the trap-jaw ants have a springy system.
C. Why the trap-jaw ants’ jaws move so fast. D. How a bow and arrow works.
74. Which of the following things may amaze the scientists most?
A. How high the ants can leap by using their jaws.
B. How quickly the trap-jaw ants can move on the ground.
C. How wonderfully the springy system in the trap-jaw ants’ jaws works.
D. How quickly the trap-jaw ants can grab food or enemies.
75. According to the passage, the trap-jaw ants’ jaws keep them safe because ______.
A. they can catch their enemies easily with their jaws
B. their jaws make them difficult to recognize
C. their jaws help them to find food easily
D. their jaws help them to escape from their enemies
BCAD
完形填空（共20小题；每小题1.5分，满分30分） 阅读下面短文，掌握其大意，然后从各题所给的四个选项（A、B、C和D）中，选出最佳选项。
Two friends visited the zoo together. The zoo was very large and it was 3 6 to go everywhere. They had to decide where and which animal to visit as their time was 3 7. So both of them agreed not to 3 8 after choosing a 3 9 at every fork (岔路口). A road sign at the first fork 4 0 one way to the lion quarters and the other to the tiger hill. They decided on the 4 1 after a 4 2 discussion because lions were “the king of the grassland”. The second showed a division (路口) going separately to the panda and peacock. They 43 panda as it was the nation’s treasure and went its way. Thus they made choices all along the way and each choice meant 44 what they couldn’t help regretting. But they had to make it, and 45 , for it brooked(容忍) no delay. If they hesitated (犹豫不决) they would miss 46 . Only 47 decision could offer more chances for sightseeing and 48 possible regret. Life is 49 like this—choices often occur that one has to make, for example, between two 50 jobs, two fascinating wooers(追求者). To get one you 51 give up the other——you can get half of it. If you 52 weighing the pros and cons and calculating gains and losses, you will most likely 53 empty-handedness. Don’t be sad about it. 54 you have got half of the desirable things in life——something that is 55 to come by.
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The New York Aquarium (水族馆) offers a diverse collection and nice viewing experience for all our guests. Whether you’re observing penguins on their rocky coastline home or swimming underwater, looking at a coral reef (珊瑚礁) under the water, or cheering on California sea lions at the theater, you’ll find plenty to see and do during your visit. Your underwater adventure is waiting for you! This summer, head out to Coney Island to learn about the underwater world at the New York Aquarium.
Just off the Coney Island in Brooklyn, the New York Aquarium features more than 300 marine (海洋的) species, such as dolphins and seals. Meet some of our mammals and fish, and learn about their natural history, biology, and cultural roles.
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Summer hours May 28 – Sept. 5 |
10:00 a.m. – 6:00 p.m. , Monday–Friday 10:00 a.m. – 7:00 p.m. , Weekends & Holidays |
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Fall hours Sept. 6 – Nov. 6 |
10:00 a.m. – 5:00 p.m. , Monday–Friday 10:00 a.m. – 5:30 p.m. , Weekends & Holidays |
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Winter hours Nov. 7 – Mar. 31 |
10:00 a.m. – 4:30 p.m. , Daily |
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Spring hours Apr. 1– May 27 |
10:00 a.m. – 5:00 p.m. , Monday–Friday 10:00 a.m. – 5:30 p.m. , Weekends & Holidays |
Total Experience Ticket
Adult $18.00
Child (Ages 3-12) $14.00
Senior (65+) $15.00
Groups (at least ten visitors) $8.00
﹡Includes admission to our 4-D Theater Plus General Admission.
﹡Children under 3 years old are free!
﹡To receive the group rate, you must make a reservation at least two weeks in advance of your group’s visit. Please call 718-741-1818.
Friday Afternoon Special
Admission on Fridays beginning at 3:00 p.m. is by donation. Suggested donation is $13 for adults, $9 for children, and $10 for seniors. Every dollar you give supports our work in caring for animals at the aquarium.
Aquarium Parking
Car $13.00
Bus $13.00
Please note:
﹡Due to rising costs, the Wildlife Conservation Society reserves the right to change all fees without notice.
﹡All Aquarium buildings and exhibits are wheelchair-accessible.
﹡For further information, please call 718-265-3454.
1.Which animal can’t visitors probably see at the New York Aquarium?
A. Penguins. B. Pandas. C. Dolphins. D. Seals.
2.Six adults (including a man of 68) and two children (aged 2 and 10) are going to visit the New York Aquarium on Sunday. They will have to pay ______________ at least.
A. $144 B. $133 C. $64 D. $119
3.The donation is used to ______________.
A. help the poor people
B. help to save the endangered animals in the wild
C. care for animals at the aquarium
D. help the disabled visitors
4.Which of the following statements is TRUE according to the passage?
A. You can visit the New York Aquarium at 5:30 p.m. on Christmas.
B. A visitor in a wheelchair can get around at the New York Aquarium.
C. Visitors can enjoy free parking service on Friday.
D. To enjoy the group rate, visitors must make a reservation at least two weeks in advance by sending an e-mail.
