参与交易的各方应当获得平等的机会，这是证券交易（）原则。
A.效率
B.公正
C.公平
D.公开
参考答案：C
— Excuse me, could you tell me ______ a book about music?
— Sure. They are on the second floor. [ ]
A. where can I buy
B. where I can buy
C. when can I buy
D when I can buy
已知国民消费曲线是C=50+0.8Y，处于超支的点是Y=200。（）
