（）近似于看涨期权，行权时其持有人可按照约定的价格购买约定数量的标的资产。
A.认股权证
B.认沽权证
C.认购权证
D.备兑权证
参考答案：C
A．( She will use her study time more effectively
B．( She will buy second-hand books from the store
C．( She will spend her money on something else
D．( She will devote more time to working extra hours
关于环甲膜穿刺术说法不正确的是（）
A.病人去枕平卧，头后仰
B.气管给药时，针头刺入环甲膜后立即注射药物
C.注射用药物以等渗盐水配置
D.若穿刺部位出血，可用消毒干棉球压迫片刻
E.术后病人咳出带血分泌物现象一般在1～2d内会消失
