蛛网膜下腔出血最常见的病因是
A．血液系统疾病B．先天性颅内动脉瘤C．钩端螺旋体所致脑动脉炎D．烟雾病E．心脏病
参考答案：B
Anyone not paying the registration fee by the end of this month will be ______ to have withdrawn from the program.
A．contemplated
B．deemed
C．acknowledged
D．anticipated
任脉起始于（）。
A.脐中
B.太冲
C.胞中
D.关元
E.血海
