Why does the passage say anxiety is part of the "fight or flight" mechanism？
Anxiety is an organ of our body or part of our body.
B. Anxiety is a warning for you to fight or to escape from danger.
C. Anxiety kept people alive when in danger.
D. Anxiety is a carry-over from our ancient ancestors
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A．Finish a textbook assignment.B．Review for the final examination.C．Choose proper rese
A. Finish a textbook assignment.
B. Review for the final examination.
Choose proper research topics.
D. Prepare an outline for a paper.
衍生金融工具的最大特点是()
A. 流动性
B. 收益性
C. 安全性
D. 能够以少量资金从事数倍乃至数十倍的交易
听力原文：M：I think the hostess really went out of her way to make the party a success．
W：Yes．The food and drinks were great．But if only we had known a few of the other guests．
Q：What did the two speakers say about the party？
(13)
A. They enjoyed the party better than the other guests.
B. They knew none of the other guests at the party.
C. They didn't think much of the food and drinks.
D. They went a lone way to attend the party.
债券流通市场是()
A. 债券转让交易活动的总称
B. 债券一级市场
C. 股票市场的一个重要补充
D. 以上都不对
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