肺上端癌肿容易发生霍纳综合征是（）
A.肺上沟癌
B.纵隔型肺癌
C.肺段型肺癌
D.瘢痕癌
E.肺泡癌
参考答案：A
We just walk around the town center, seeing __________ we can.[ ]
A. as many of our friends as
B. as much of our friends as
C. as more of our friends as
D. as most of our friends as
Dg50表示公称直径为（）。
