与强直性脊柱炎有关
A．良性骨肿瘤B．恶性骨肿瘤C．有恶性倾向的良性骨肿瘤D．骨瘤样病变E．继发性骨肿瘤
参考答案：C
腹内恶性肿瘤的早期临床表现为（）。
A.发展较快
B.活动性差
C.有明显压痛
D.易转移
E.病人明显消瘦
Only after they had discussed the matter for several hours ________a decision．[ ]
A．they reached
B．did they reach
C．they reach
D．do they reach
