静脉滴注药物时，为了在短时间内使血药浓度接近稳态浓度，临床上一般在滴注前先静脉注射一个负荷量<img src="/Image1/05/052f986a768de7dfadb2644ae9262c70.gif" />。已知某药物的消除速度常数k=0.0345h<img src="/Image1/b6/b6affcc7c2c455374a486f7b667371b0.gif" />，预先设定的滴注速度为k<img src="/Image1/e5/e54af9255dd8e5b4ef8ddf9870a60179.gif" />=0.345mg·h<img src="/Image1/b6/b6affcc7c2c455374a486f7b667371b0.gif" />，Css为15μg·ml<img src="/Image1/b6/b6affcc7c2c455374a486f7b667371b0.gif" />，则静脉注射的负荷剂量<img src="/Image1/05/052f986a768de7dfadb2644ae9262c70.gif" />为（）<br>A:10mg<br>B:100mg<br>C:0.012mg<br>D:120mg<br>E:5mg