目前用于局域网、城域网和广域网的数据交换技术是()
A.高速分组交换
B.分组交换
C.电路交换
D.报文交换
E.ATM异步传输交换
参考答案:A
--I’d like to invite you to dinner this Saturday.
--_______.
A.Oh, no, let’s not
B.I’d rather stay at home
C.I’m very sorry, but I have other plan
D.Oh, no. That’ll be too much trouble.
汽轮机高压油泵的出口压力主油泵出口油压()
A.大于;
B.等于;
C.小于;
D.稍小于。