Peter _____ breakfast at home every day.[ ]
A. having
B. have
C. has
D. is having
答案:C
沾锡操作方法为清理锡渣→()→移离锡炉→()。
17岁男性患者发现镜下血尿,其尿常规中红细胞为
A.>3个/HPB.>5个/HPC.>7个/HPD.>1个/HP