内生软骨瘤的X线表现是
A．葱皮样骨膜反应
B．日光放射状骨膜反应
C．骨增生反应
D．低密度区内夹杂钙化斑块
E．密度增高的肿瘤骨
参考答案：D
Even if the treatment _____, there is still no magic pill for patients in the late stages of AIDS. [ ]
A. does
B. uses
C. works
D. helps
奥卡姆剃刀
