腰椎穿刺的禁忌证不包括
A．颅内压明显增高
B．皮下组织感染者
C．病情危重、躁动不安
D．尿毒症
E．高位颈椎外伤、占位性病变者
参考答案：D
Foreign trade, the ____ of goods between nations, takes place for many reasons.
A．exchange
B．bargain
C．production
D．business
静脉的管壁较______，弹性______，管内血流的速度______．
