Câu hỏi:
01/09/2021 754Read 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 from 36 to 42
There are many theories of aging, but virtually all fall into the category of being hypotheses with a minimum of supporting evidence. One viewpoint is that aging occurs as the body's organ systems become less efficient. Thus failures in the immune system, hormonal system, and nervous system could all produce characteristics that we associate with aging. Following a different vein, many current researchers are looking for evidence at the cellular and sub cellular level.
It has been shown that cells such as human fibroblasts (generalized tissue cells) grown in culture divide only a limited number of times and then die. (Only cancer cells seem immortal in this respect). Fibroblast cells from an embryo divide more times than those taken from an adult. Thus some researchers believe that aging occurs at the cellular level and is part of the cell's genetic makeup. Any event that disturbs the cell's genetic machinery such as mutation, damaging chemicals in the cell's environment, or loss of genetic material, could cause cells to lose their ability to divide and thus bring on aging. Other theories of aging look at different processes. Chronological aging refers to the passage of time since birth and is usually measured in years. While chronological age can be useful in estimating the average status of a large group of people, it is a poor indicator of an individual person's status because there is a tremendous amount of variation from one individual to the next in regard to the rate at which biological age changes occur. For example, on the average, aging results in people losing much of their ability to perform strenuous activities, yet some elderly individuals are excellent marathon runners.
Another type of aging is cosmetic aging, which consists of changes in outward appearance with advancing age. This includes changes in the body and changes in other aspects of a person's appearance, such as the style of hair and clothing, the type of eyeglasses, and the use of a hearing aid. Like chronological aging, it is frequently used to estimate the degree to which other types of aging have occurred. However, it is an inaccurate indicator for either purpose because of variation among individuals and because a person's appearance is affected by many factors that are not part of aging, including illness, poor nutrition, and exposure to sunlight
The author points out that cancer cells_____________
Đáp án chính xác
Câu hỏi trong đề:
[Năm 2024] Đề thi thử môn Tiếng anh THPT Quốc gia có lời giải (30 đề) !!
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
Đáp án A
Câu hỏi. Tác giả chỉ ra rằng các tế bào ung thư_____________.
A. Có vẻ sẽ tồn tại mãi mãi
B. Phân chia rồi chết
C. Phân chia ở trẻ sơ sinh nhiều hơn ở người lớn
D. Mất khả năng phân chia
Ta tìm thấy thông tin câu trả lời ở đoạn 2, dòng 2: Only cancer cells seem immortal in this respect.
Tạm dịch. Chỉ có các tế bào ung thư là có vẻ bất diệt trong việc này.
Ta có từ immortal (adj) - bất tử, bất diệt diễn tả ý tương đồng với “live forever” trong đáp án A
Nhà sách VIETJACK:
CÂU HỎI HOT CÙNG CHỦ ĐỀ
Câu 1:
Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions
Every student is required to write an essay on the topic
Xem đáp án »
07/06/2024
111,658
Câu 2:
Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions
His parents are away on holiday. He really needs their help now
Xem đáp án »
01/09/2021
75,483
Câu 3:
Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions
Helen wrote a novel. He made a cowboy film, too
Xem đáp án »
01/09/2021
53,909
Câu 4:
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
Mrs. Mai (A) and (B) her friends from Vietnam (C) plan (D) to attend the festival now
Xem đáp án »
01/09/2021
44,144
Câu 5:
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions
………..he worked, the more he earned
Xem đáp án »
01/09/2021
39,718
Câu 6:
Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions
We are very grateful to Professor Humble for his generosity in donating this wonderful painting to the museum
Xem đáp án »
01/09/2021
36,856
Câu 7:
Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions
ANU has maintained its position as Australia's top university.
Xem đáp án »
01/09/2021
32,219
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