what's the meaning of the underlined word“positive” in the passage.

what's the meaning of the underlined word“positive” in the passage.
what's the meaning of the underlined word“positive” in the passage.

what's the meaning of the underlined word“positive” in the passage.
在这段中,划线单词“positive”是什么意思?

正解

文中划线的词“positive"是什么意思？