心肌收缩力加强导致静脉回心血量增加的机制是
A．动脉血压升高
B．血流速度快
C．心缩期室内压较低
D．心舒期室内压较低
E．静脉血流阻力下降
参考答案：D
气性坏疽的病原菌主要侵犯（）
A.皮下脂肪组织
B.筋膜蜂窝组织
C.肌肉组织
D.骨与关节
E.伤处附近所有软组织
I assure you that the matter______as quickly as possible. Have a little patience.
A．has been attended to
B．will be attended to
C．is attended to
D．has attended to
