Which of the following is true according to the text？
A. Experts ignored the tend-and-befriend response because they didn"t have a scientific explanation.
B. Men"s social networks are more likely to induce stress and confrontation.
C. Men cannot tend and befriend as they don"t release certain kind of hormones.
D. The connection between female aggression and nervous system arousal is not that obvious.
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According to the text, who can benefit from high emotional intelligence？
A. People in educational fields.
B. Even people in fields that you might not expect.
C. People who work at home.
D. Those whose jobs involve interacting with people every day.
公钥基础设施PKI是一个能完成用户的管理、密钥的分发、仲裁认证等一系列的工作基础平台。()
The word "currency"(line 2, para. 2)most probably means "______".
A. money
B. prevalence
C. codec
D. understanding
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