属于管道组成件的管道元件是（）。
A.法兰
B.锚固件
C.阀门
D.垫板
E.管座
参考答案：A, C
颅颌面外科的兴起扩大了肿瘤切除的_________，进一步提高了_________。
I wanted to have a word with her, but she______ me and went away. [ ]
A. saw
B. calmed
C. told
D. ignored
