Many of the most striking beasts on the planet come in only two colors: black and white. These high-contrast markings represent some of the nature's most diverse evolutionary choices. For some animals, black -and- white coloring is a way to warn off natural enemies. For others, to keep insects away. For still others, it creates a clever cover. Spend some time exploring what science has discovered about these animals’ appearances, and you will see that basic black and white isn't so basic after all.
Skunk
Depending on the species, black skunks may wear white spots that act as a cover or white stripes(条纹)that signal enemies to watch out for their smelly spray.
Giant Panda
Resent insights into panda coloring have come from studying each body part separately. Black ears indicate fierceness, and distinct eye patches aid in individual recognition. The panda in white body hides it against snow, white its dark limbs(四肢) keep it from being spotted in forests, a compromise developed from its poor bamboo diet:Bamboo doesn’t let pandas build up enough fat to hibernate(冬眠), forcing them to spend winters in the snow.
Badger
Even when a badger is in its cave, its facial stripes can be seen, Zoologists say the warning coloration helps the small animal prevent natural enemies.
Blackbuck(male)
In bright sun, the buck’s white stomach reduces the effect of the shadow cast by his back, allowing him to appear one color and two dimensional---especially hiding from natural enemies in his own shadown.
1.Which animals can use their color to warn off natural enemies?
A. Skunk and Badger B. Giant panda and Zebra
C. Badger and Blackbuck D. Zebra and Blackbuck
2.White body and dark limbs help the giant panda to ________.
A. show fierceness B. store fat
C. recognize individuals D. take cover
3.What can be a suitable title for the text?
A. Which animals have black- and- white color?
B. How some animals protect themselves from harm.
C. Why so many animals wear black- and- white coats?
D. What science has discovered about different colors.
听下面一段独白，回答以下小题。
1.Who will give the speech on "China's Road Into Space"?
A. Tom Miller. B. Li Yang. C. Julia Moore.
2.When are attendees advised to arrive at the spot?
A. Before 13:45. B. At 14:00. C. After 14:30.
3.Which items are forbidden to take?
A. Mobile phones. B. Laptop computers. C. Smart watches.
4.What is the speak doing?
A. Delivering a lecture. B. Inviting some experts. C. Introducing a program.
听下面一段较长对话，回答以下小题。
1.How does the woman feel?
A. EnergetiC. B. Confident. C. Anxious.
2.What probably is the woman's major?
A. English. B. Biology. C. Education.
3.What is the man's task?
A. Doing his projects. B. Writing his paper. C. Reading his book.
4.What does the man mean?
A. He will treat the woman to dinner.
B. He will lend the woman a gift card.
C. The woman should have saved money.
听下面一段较长对话，回答以下小题。
1.What is the probable relationship between the speakers?
A. Coach and learner.
B. Driver and policeman.
C. Interviewer and interviewee.
2.What does the man suggest the woman do?
A. Practice more. B. Drive slower. C. Submit her application.
3.What can we say about the man?
A. He's rude. B. He's humorous. C. He's patient.
听下面一段较长对话，回答以下小题。
1.What kind of TV series are the speakers talking about?
A. Sci-fiction. B. Crime. C. Documentary.
2.What does the woman think of the TV series?
A. It's confusing. B. It's boring. C. It's thrilling.
听下面一段较长对话，回答以下小题。
1.What do we know about the man?
A. He is ill. B. He likes reading. C. He is daydreaming.
2.What are the speakers going to do?
A. Read books together. B. Buy a camerA. C. Watch the sunset.
