下列图形描述的是( )与风险程度的关系。
A.(A) 期望报酬率
B.(B) 风险报酬率
C.(C) 无风险报酬
D.(D) 投资报酬率
参考答案:B
There are twenty students in the classroom.One of them __________ American.[ ]
A. is
B. are
C. look like
领先指标