问题
单项选择题
无线数传业务涉及到关键技术是（）。
A.MPLSVPN
B.VPDN
C.PPPOE
D.L2TP
答案
参考答案：B
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无线数传业务涉及到关键技术是（）。
A.MPLSVPN
B.VPDN
C.PPPOE
D.L2TP
参考答案：B
根据对话内容，从方框内选择词的适当形式填空，每空只能填一词，每个词只能用一次。
B: Yes, I was so excited to see the 1___________! They were so cute. A: It was 2____________to learn about the Wolong Panda Reserve. B: But it’s sad to think about all those animals in 3___________. It makes me mad! A: The surprising thing is to hear how many animals are in danger. B: I think we need to 4____________ them better. A: Let’s find out what we can do to save 5_____________. |