Biologically speaking, tears are actually drops of saline fluid, which is a little bit salty, produced by a gland(腺)in the body. Because salt is an important component, tears may actually constitute the most conclusive evidence that the human animal is the end product of a long evolutionary process that began in the sea.
And it is clear that, in addition to the emotional benefits, the shedding of tears has a specific biological function as well. Through tears, we can eliminate from our body certain chemicals which build up in response to stress and create a chemical imbalance in the body. Crying actually makes us feel better by correcting that imbalance and making us feel good again. And thus the emotional and the biological functions of tears merge(合并)into one and make us even more “human” than we would otherwise be.
61. According to the passage, human beings may have originated in ____.
A. the sea B. the salt C. chemicals D. animals
62. Which of the following is NOT a function of tears?
A. Biological. B. Emotional. C. Political. D. Chemical.
63. According to the article, which of the following is unique to humans?
A. The feeling of loneliness. B. The state of feeling good.
C. The ability to shed tears. D. The feeling of fear.
64. The underlined word “eliminate” probably means ____.
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