VPI指的是().
A、虚通路标识
B、虚通道标识
参考答案:A
-How many ____ are there on the table7
- four. [ ]
A. bananas; There are
B. bananas; There is
C. banana; There are
---I’m going to Vietnam?
---How long ___ you___ in Vietnam?
A.are; stayed
B.are; staying
C.have; stayed
D.did; stay