常见高血压并发症有()
A．糖尿病
B．夹层动脉瘤
C．心脑肾和周围血管病
D．眼底血管痉挛
E．慢性肾炎
参考答案：C
桡骨头置换的指征是（）
A.MasonⅢ型骨折
B.Essex-Lopresti损伤，桡骨头粉碎性骨折，无法进行坚强内固定治疗
C.桡骨头粉碎性骨折，无法进行坚强内固定治疗且合并肘关节脱位或不稳
D.青壮年患者，MasonⅢ型骨折合并内侧副韧带损伤
E.MasonⅡ型骨折
English teaching in China didn't enter into the formal educational system until the ______ century.
A. late 19th B. early 20thC. mid-20th D. late 20th
