会计科目名称只能用汉字。 ( )
参考答案：错
解析： 会计科目名称不仅可以用汉字，也可以用字母和数字。
当套期保值资产价格与标的资产的期货价格的相关系数等于1时，为了使套期保值后的风险最小，套期比率应等于1。( )
-- Has your elder brother returned from Africa yet?
-- Yes, but he _________ here for only three days before his company sent him to Australia.
A．was
B．has been
C．will be
D．would be
