HIV感染,可通过以下实验室方法检测()。
A.HIV特异性抗体
B.HIV病毒分离培养
C.HIV核酸检测
D.HIVp24抗原检测
参考答案:A, B, C, D
Quite ______ of my friends have visited the Great Wall.[ ]
A. a few
B. a bit
C. a little
D. a few
简述“绿腰”?