—Where ______ they from?
—They're from China.[ ]
A. is
B. am
C. are
C
ISDN的基本速率接口(BRI)提供的通道是2B+D,B通道的速率是()。
A.64kbps
B.16kbps
C.1.544Mbps
D.2.048Mbps
系膜毛细血管肾小球肾炎又称为()
A.毛细血管内增生性肾小球肾炎
B.系膜增生性肾小球肾炎
C.膜增生性肾小球肾炎(膜性肾病)