在其他因素不变的条件下，期权有效期越长，其时间价值也就越大。( )
参考答案：对
The film makes me think of the happiest days ______ we spent together.
A．when
B．where
C．that
D．which
侵蚀性葡萄胎与绒毛膜癌均可发生于
A．输卵管妊娠后B．人工流产后C．自然流产后D．葡萄胎排空后E．足月分娩后
