中央型肺癌的早期诊断主要依据是（）
A.正侧位胸片
B.螺旋CT
C.MRI
D.PET
E.痰细胞学及支气管镜
参考答案：E
下列程序段的执行结果是______。i=0For j = 10 To 19 Step 3 i=i+1Next jPrint I
A．4
B．5
C．3
D．6
Li Hua, who was busy preparing a report, couldn’t the loud noise, so he kept all the windows shut all day long.
A．put up with
B．come up with
C．catch up with
D．keep up with
