Which group of people smoked more according to the passage?
Đáp án C
The phrase "come into contact with” in the second paragraph mostly means ____.
The underlined word “it” in the second paragraph refers to ________________.
The underlined word “picture” in the last paragraph probably means ______________.
The word “proliferate” in paragraph 1 is closest in meaning to ______.
According to the passage, sometimes heredity and environment _____.
According to the passage, what is the most important environmental factor in personality development?