慢性硬脑膜下血肿最可能的出血来源是（）
A.板障静脉
B.导静脉
C.硬脑膜中动脉
D.桥静脉
E.静脉窦
参考答案：D
After he retired from office, Tom ___ painting for a while , but soon lost interest.
A．kept up
B．took up
C．sped up
D．cleaned up
直接式进攻战术是跆拳道战术的种类之一。
