一Is there a computer on Miss Li's desk?

—_____. There are only some books on it. [ ]

A. Yes, there is

B. No, there isn't

C. Yes, it is

D. No, it isn't

关于小肠的叙述，错误的是

A．空肠位于左腹部
B．十二指肠是小肠的第一部分
C．回肠位于中腹部和右下腹部
D．空肠与回肠分界在中腹部
E．十二指肠空肠曲位于胃体和胰体之间