强力霉素与四环素联合应用属于（）
A.选用药物不当
B.合并用药不当
C.用药过量
D.重复用药
E.无必要地使用价格昂贵的药品
参考答案：D
结核菌素试验强阳性结果应为（）.
A.红晕直径≥15mm
B.硬结直径≥20mm
C.硬结直径≥10mm
D.硬结直径≥12mm
E.红晕直径≥20mm
--- To be a promising student is not an easy job. It takes time.
--- I can’t agree more. _______. There is no short cut.
A．All roads lead to Rome
B．Slow but sure wins the race
C．Practice makes perfect
D．Rome was not built in a day
