Dale Peterson plans to lease a computer from Gray Computing Services. It will be a 10-year lease with annual payments of $ 2400 plus a guarantee of a residual value of $ 4000 at the end of the lease. The asset has a 12 year useful life. The present value of the lease discounted at the appropriate interest rate of 9 percent is $ 17000. The company uses the straight-line depreciation method. In the first year, the reported lease expense is:（）

A. $3230.

B. $1530.

C. $2830.

急性红白血病（）

A.POX强阳性

B.细胞内、外铁明显减少

C.PAS阳性

D.α-NAE强阳性

E.NAP明显降低