一般来说,ADSL的上行速率()下行速率。
参考答案:小于
竞争法检测HBeAb时,酶标板包被的是()
A.抗体(HBeAB.
B.其他抗体
C.牛血清白蛋白
D.固相抗-人IgMμ链
E.抗原(HBeAg)
一 Mom,what did your doctor say?
一 He advised me to live _____ the air is fresher. [ ]
A. in where
B. in which
C. the place where
D. where