等速肌力测试的绝对禁忌证是()
A.关节失稳
B.骨关节恶性肿瘤
C.软组织瘢痕挛缩
D.严重疼痛
E.急性肿胀
参考答案:A, B, C, D, E
交界性早搏的心电图表现是()
A.有窦性P′波
B.QRS>0.12s
C.代偿间期常完全
D.偶联间期常固定
E.提前出现的QRS波群,逆行P′波可有可无
In ______ English became a formal requirement for the college entrance examination in China and began to appear in the curriculum for the 4th and 5th year of primary schools.
A.1952
B.1962
C.1972
D.1982