The author suggests that melanin _____.
Giải bởi Vietjack
Đáp án D
Tác giả gợi ý rằng melanin _____.
The brown pigment melanin which is synthesized under the influence of sunlight, makes a screen to protect the underlying tissues from the harmful effects of further sunlight.
A. là cần thiết cho việc sản xuất vitamin-D
B. có lợi ở vùng khí hậu không có nắng.
C. giúp bảo vệ người da trắng
D. là một sản phẩm tổng hợp
Why do teenagers have such a close relationship with their mobile phones?
In what sense has the impact of phones been “local” in paragraph 3?
The word "predecessors" in the last paragraph is closest in meaning to ________.
The navigation product launched in Sweden is helpful for drivers because ______.
When the writer first went to London, he was disappointed because ________.
From the passage, it can be inferred that the author views body building _____.
The author mentions the Dakota and the Ansonia in paragraph 3 because ________.
The word “moderate” in the fourth paragraph is closest in meaning to “______”.
The word “sumptuous” in paragraph 1 is closest in meaning to ________
