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 navigation product launched in Sweden is helpful for drivers because ______.
From the passage, it can be inferred that the author views body building _____.
The word “moderate” in the fourth paragraph is closest in meaning to “______”.
The word "predecessors" in the last paragraph is closest in meaning to ________.
The decline of the Greek aristocracy's power in the sixth century B.C ________ .
The word “sumptuous” in paragraph 1 is closest in meaning to ________
It can be inferred that a New York apartment building in the 1870’s and 1880’s had all of the following characteristics EXCEPT________
