可使用热疗的情况是()
A.胃出血
B.腰肌劳损
C.皮肤湿疹
D.踝关节扭伤早期
E.未确诊的急性腹痛
参考答案:B
Barry must have visited the Eiffel Tower before, _____ he?[ ]
A. mustn't
B. hasn't
C. didn't
D. needn't
桥墩是桥梁的约束。