在比例尺为1:200的地图上,测得A,B两地间的图上距离为4.5cm,则A,B两地间的实际距离为( )m。
9
I had only ten yuan with me, ______ I couldn't buy the expensive dress. [ ]
A. though
B. but
C. so
D. because
治疗流脑时,在磺胺药中首选SD的原因哪项除外
A.抗脑膜炎球菌作用强B.容易扩散到组织中C.血药浓度高D.与血浆蛋白结合率低E.脑脊液中浓度高