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?
The word "predecessors" in the last paragraph is closest in meaning to ________.
The navigation product launched in Sweden is helpful for drivers because ______.
The word “moderate” in the fourth paragraph is closest in meaning to “______”.
From the passage, it can be inferred that the author views body building _____.
In what sense has the impact of phones been “local” in paragraph 3?
According to the writer, many people from Jamaica at that time ________.
Approximately how many cars were there in the United States in 1900?
