膀胱原位癌的病变
A．达膀胱深肌层
B．达膀胱浅肌层
C．侵犯膀胱壁外组织
D．限于固有层以内
E．位于膀胱黏膜层内
参考答案：E
On the National Day, up _____ into the air. Then the crowd cheered up. [ ]
A. go the balloons
B. did the balloons go
C. went the balloons
D. the balloons went
按照螺旋线的数目不同，螺纹可分为（）。
A.单、双线螺纹
B.左、右旋螺纹
C.单、多线螺纹
D.粗、细牙螺纹
