Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.
The response of most animals when suddenly faced with a predator is to flee. Natural selection has acted in a variety of ways in different species to enhance the efficacy of the behaviors, known as "flight behaviors" or escape behaviors that are used by prey in fleeing predators. Perhaps the most direct adaptation is enhanced light speed and agility.
Adaptations for speed, however, are likely to require sacrifices biter attributes, so we might expect only some species to adopt a simple fast flight strategy. Another way of enhancing the effectiveness of flight is to move in an erratic and unpredictable way. Many species, like ptarmigans, snipes, and various antelopes and gazelles, flee from predators in a characteristic zigzag fashion. Rapid unexpected changes in flight direction make it difficult for a predator to track prey. In some species, like the European hare, erratic zigzag flight might be more effective in the presence of predators that are faster than they are and straight flight more effective against predators that are slower. One observation that supports this suggestion is the recorded tendency for slow-flying black-beaded gulls, which are normally able to escape predators by means of direct flight, to show frequent changes in flight direction when they spot a peregrine falcon (peregrines are adept at capturing flying birds).
A quite different way of enhancing escape by flight is to use so-called "flash" behavior. Here, the alarmed prey flees for a short distance and then "freezes." Some predators are unexcited by immobile prey, and a startling flash of activity followed by immobility may confuse them. "Flash" behavior is used in particular by frogs and orthopteran insects, which make conspicuous jumps and then sit immobile. In some species, "flash" behavior is enhanced by the display of bright body markings. Good examples of insects with colorful markings are the red and yellow underwing moths. At rest, both species are a cryptic brown color. When they fly, however, brightly colored hind wings are exposed, which render the moths highly conspicuous. Similarly, some frogs and lizards have brightly colored patches or frills that may serve a “flash" function when they move quickly. Some species even appear to possess "flash" sounds. The loud buzzing and clicking noises made by some grasshoppers when they jump may serve to emphasize the movement
The description of the prey's movement as "zigzag" in line 10 suggests that the movement is_________
A. reliable
B. fast
C. constant
D. unpredictable
Giải bởi qa.haylamdo.com
Đáp án D
Đoạn 2: “In some species, like the European hare, erratic zigzag flight might be more effective in the presence of predators that are faster than they are and straight flight more
effective against predators that are slower.” = Ở một số loài, như loài thỏ rừng châu Âu, cuộc
chạy trốn theo hình zigzag gián đoạn có thể hiệu quả hơn với sự xuất hiện của động vật ăn thịt
nhanh hơn chúng và chạy trốn theo đường thẳng hiệu quả hơn trước những động vật ăn thịt
chậm hơn => zigzag = unpredictable = không thể dự đoán trước
Mark the letter A, B, C or D on your answer sheet to show the underlined part that needs correction in each of the following questions
A mosquito (A) is filled with blood (B) is carrying (C) twice its own body (D) weight
Mark the letter A, B, C or D on your answer sheet to show the underlined part that needs correction in each of the following questions
Employees (A) who haven't seen the new regulations often (B) ask for unnecessary questions; (C) instead they should ask for a copy of the regulations and (D) read them
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase for each of the blanks.
Feminism, collective term for systems of belief and theories that pay special (24)_________to women’s rights and women’s position in culture and society. The term tends to be used for the women’s rights movement, which began in the late 18th century and continues to campaign for complete political, social, and economic equality between women and men. This article (25)_________specifically with the development of the ideas behind that movement and their (26)_________and impact.
Feminists are united by the idea that women’s position in society is unequal to (27)_________of men, and that society is structured in such a way as to benefit men to the political, social, economic (28) _________of women. However, feminists have used different theories to explain these (29)_________and have advocated different ways of redressing inequalities, and there are marked geographic and historical variations in the nature of feminism.
Historically, feminist thought and activity can be divided into two waves. The first wave, which began in about 1800 and (30)_________until the 1930s, was largely concerned with gaining equal rights between women and men. The second wave, which began in the late 1960s, has continued to fight for (31)_________but has also developed a (32)_________of theories and approaches that stress the difference between women and men and that draw attention to the (33)_________needs of women.Question 24
The scheme sounds excellent in theory, but it’s totally_________in a country like this
It was going to be a surprise party, until Todd let_________out of the bag
When the burglar caught sight of the policeman, he dropped the stolen jewels and_________
Mark the letter A, B, C or D on your answer sheet to show the underlined part that needs correction in each of the following questions
(A) Although they are (B) an inexpensive supplier of vitamins, minerals, and high quality protein, eggs (C) contain a high level of blood cholesterol, one of the major (D) cause of heart disease
I really must_________these trousers because I want to wear them in the morning
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.
The response of most animals when suddenly faced with a predator is to flee. Natural selection has acted in a variety of ways in different species to enhance the efficacy of the behaviors, known as "flight behaviors" or escape behaviors that are used by prey in fleeing predators. Perhaps the most direct adaptation is enhanced light speed and agility.
Adaptations for speed, however, are likely to require sacrifices biter attributes, so we might expect only some species to adopt a simple fast flight strategy. Another way of enhancing the effectiveness of flight is to move in an erratic and unpredictable way. Many species, like ptarmigans, snipes, and various antelopes and gazelles, flee from predators in a characteristic zigzag fashion. Rapid unexpected changes in flight direction make it difficult for a predator to track prey. In some species, like the European hare, erratic zigzag flight might be more effective in the presence of predators that are faster than they are and straight flight more effective against predators that are slower. One observation that supports this suggestion is the recorded tendency for slow-flying black-beaded gulls, which are normally able to escape predators by means of direct flight, to show frequent changes in flight direction when they spot a peregrine falcon (peregrines are adept at capturing flying birds).
A quite different way of enhancing escape by flight is to use so-called "flash" behavior. Here, the alarmed prey flees for a short distance and then "freezes." Some predators are unexcited by immobile prey, and a startling flash of activity followed by immobility may confuse them. "Flash" behavior is used in particular by frogs and orthopteran insects, which make conspicuous jumps and then sit immobile. In some species, "flash" behavior is enhanced by the display of bright body markings. Good examples of insects with colorful markings are the red and yellow underwing moths. At rest, both species are a cryptic brown color. When they fly, however, brightly colored hind wings are exposed, which render the moths highly conspicuous. Similarly, some frogs and lizards have brightly colored patches or frills that may serve a “flash" function when they move quickly. Some species even appear to possess "flash" sounds. The loud buzzing and clicking noises made by some grasshoppers when they jump may serve to emphasize the movement
It can be inferred from the passage that the European hare_________
