关于租赁合同的性质下列说法正确的是()
A.租赁合同是实践性合同
B.租赁合同是有偿合同
C.租赁合同是单务合同
D.租赁合同是一种不具有确定期限的合同
参考答案:B
---- How long ____ at this job?
---- Since 1990.
A.were you employed
B.have you been employed
C.had you been employed
D.will you be employed
LKJ系统检测良好率指标是多少?