语法具有（）性、（）性和（）性。
参考答案：抽象；稳固；民族
The tendency to commit additional funds to a position that has decreased in value is known in behavioral finance as:（）
A. overconfidence bias.
B. confirmation bias.
C. escalation bias.
气滞证的特征是
A．头昏眼花
B．胀闷疼痛
C．嗳气恶心
D．腹部坠胀
