颅底骨折伴延期脑脊液耳漏下列哪项治疗是正确的()
A.将外耳道冲洗干净
B.用棉球堵塞外耳道
C.脱水治疗
D.给予抗生素治疗
E.立即修补漏口
参考答案:D
已知圆锥的母线长为4,底面圆的半径为3,则此圆锥的侧面积是[ ]
A.6π
B.9π
C.12π
D.16π
The people in Singapore speak _____. [ ]
A. English
B.Chinese
C. Japanese and English
D. A and B