双方当事人的权利义务不对等的合同属于( )。
A．单务合同
B．双务合同
C．诺成合同
D．要务合同
参考答案：A
肝肾综合征特征是__________________________，__________________________，________________________，__________________________。
--- Don’t do that again. Don’t you think it _______?
--- It maybe _______ to be successful.
A．a waste of time; turns
B．wastes of time; turns in
C．waste of time; turns up
D．a waste of time; turns out
