隐匿性传导可发生于（）
A.房室交界区
B.窦房交界区
C.左、右束支
D.浦肯耶纤维
E.房室旁路
参考答案：A, B, C, D, E
简述党在过渡时期的总路线。
—Why can she keep such a good figure?
—She________great importance to regular exercise.[ ]
A. attains
B. attracts
C. attaches
D. applies
