治疗下肢深静脉血栓错误的是
A．各型早期均宜手术
B．卧床抬高患肢
C．用溶栓药物
D．用抗凝药物
E．用祛聚药物
参考答案：A
It is uncertain____side effect the medicine will bring about，although about two thousand patients have taken it.
A．that
B．what
C．how
D．whether
