最常使用的短波透热疗法的频率为()
A.11.67MHz
B.27.12MHz
C.33.45MHz
D.40.68MHz
E.52.38MHz
参考答案:B
Teachers should _____ their students to practice _____ English as much as possible.
A.encourage; speaking
B.let; speak
C.make; speak
D.keep;speaking
患者男,17岁,右大腿外侧间歇性疼痛逐渐加重近3个月,夜间为重,X线片及CT示右股骨干下段外侧骨皮质梭形增厚硬化,增厚的骨皮质中心隐约可见小圆形低密度灶,骨髓腔未闭合,无外伤史(图1、2)。
最可能的诊断是()
A.成骨细胞瘤
B.骨软骨瘤
C.骨样骨瘤
D.骨肉瘤
E.非骨化性纤维瘤