诊断淋病的金标准是()
A.镜下观察
B.酶联免疫吸附试验
C.淋病奈瑟菌培养
D.PCR
E.蛋白印迹试验
参考答案:C
With thick snow _____ the ground, our city looks more beautiful. [ ]
A. covers
B. covering
C. covered
D. to cover