综合布线系统的( )是指在不改变布线敷设物理结构情况下，可以重新组织网络系统。
A．可靠性 B．灵活性C．重构性 D．先进性
参考答案：C
补全对话。
A: Excuse me. Can you tell me the 1 to the post office?
B: Of course. It's 2 here. Go to the corner and 3 left. The post office is 4 the end of the street.
You can't 5 it.
A: Thank you very much. I'm 6 I'll find it.
B: 7 is one important thing I 8 to tell you.
A: 9 that?
B: Today is a holiday. The post office is 10 .
1.____ 2.____ 3.____ 4.____ 5.____
6.____ 7.____ 8.____ 9.____ 10.____
男性，22岁，右膝内侧肿块5年，生长缓慢，无明显疼痛，X线片显示股骨下端内侧干骺端杵状肿块，边缘清楚。应首先考虑的是（）。
A.骨肉瘤
B.骨巨细胞瘤
C.软骨肉瘤
D.骨软骨瘤
E.骨样骨瘤
