石竹是多年生草本，作（）栽培。
A.一年生
B.二年生
C.多年生
D.当年生
参考答案：B
He hasn't slept at all for three days. ____he is tired out.[ ]
A. There is no wonder
B. There is no need
C. It is no wonder
D. It is no way
监管当局要求银行必须持有的资本是( )。
A．会计资本
B．监管资本
C．经济资本
D．风险资本
