买进期权在金融资产价格上涨时对合约买方（）
A.不利
B.有利
C.无影响
D.影响不确定
参考答案：B
. He made a promise____he would achieve the success that his parents were looking forward to.
A．what
B．when
C．that
D．which
导线测量中主要包括那几方面误差？使用等精度仪器观测，如何提高导线测量精度？
