公共政策的权威性来源于它的()。
A.外部性
B.内部性
C.排他性
D.非排他性
参考答案:B
根据句意及首字母提示完成单词。
1. The film is about the Long M______? Have you ever seen it?
2. I'm going to fly there. Would you buy two a______ tickets for me?
3. Let's buy some pens and pencils at the s______ shop.
4. When Tim saw me, he w______ his hand to me.
5. You must wait for your turn in l______.
GPRS detach的发起方可以是()。
A.MS
B.SGSN
C.PDN
D.HLR