Câu hỏi:
19/03/2020 227Read the following passage and mark the letter A, B, C ,or D on your answer sheet to indicate the correct answer for each of the questions.
Many ants forage across the countryside in large numbers and undertake mass migrations; these activities proceed because one ant lays a trail on the ground for the others to follow. As a worker ant returns home after finding a source of food, it marks the route Line by intermittently touching its stinger to the ground and depositing a tiny amount of trail pheromone – a mixture of chemicals that delivers diverse messages as the context changes.
These trails incorporate no directional information and may be followed by other ants in either direction. Unlike some other messages, such as the one arising from a dead ant, a food trail has to be kept secret from members of other species. It is not surprising then that ant species use a wide variety of compounds as trail pheromones. Ants can be extremely sensitive to these signals. Investigators working with the trail pheromone of the leafcutter ant Atta texana calculated that one milligram of this substance would suffice to lead a column of ants three times around Earth.
The vapor of the evaporating pheromone over the trail guides an ant along the way, and the ant detects this signal with receptors in its antennae. A trail pheromone will evaporate to furnish the highest concentration of vapor right over the trail, in what is called a vapor space. In following the trail, the ant moves to the right and left, oscillating from side to side across the line of the trail itself, bringing first one and then the other antenna into the vapor space. As the ant moves to the right, its left antenna arrives in the vapor space. The signal it receives causes it to swing to the left, and the ant then pursues this new course until its right antenna reaches the vapor space. It then swings back to the right, and so weaves back and forth down the trail.
The phrase “the one” in line 8 refers to a single.
Đáp án chính xác
Câu hỏi trong đề:
Đề thi thử THPTQG năm 2019 chuẩn cấu trúc của bộ giáo dục có đáp án !!
Sách mới 2k7: Tổng ôn Toán, Lí, Hóa, Văn, Sử, Địa…. kỳ thi tốt nghiệp THPT Quốc gia 2025, đánh giá năng lực (chỉ từ 110k).
Quảng cáo
Trả lời:
Giải bởi Vietjack
A
Cụm từ "the one" trong dòng 8 đề cập đến một
A. thông điệp
B. con kiến chết
C. đường kiếm ăn
D. loài
=> đáp án A
Nhà sách VIETJACK:
CÂU HỎI HOT CÙNG CHỦ ĐỀ
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Câu 2:
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“I will pay back the money, Gloria.” Said Ivan.
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Câu 3:
Choose the answer among A, B, C, D to complete each of the sentences below:
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Câu 4:
Choose the answer among A, B, C, D to complete each of the sentences below:
Sam’s uncle, ______ is very rich, came to visit our orphanage.
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Câu 5:
Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions
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Câu 6:
Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning
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Câu 7:
Mark the letter A, B, C, or D on your answer sheet to indicate the most suitable response to complete each of the following exchanges.
- Lisa: “Have you been able to reach Peter?” - Gina: “……………”
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