有关解决台湾问题，我们要继续坚持（）的基本方针，贯彻八项主张，以最大的诚意、尽最大的努力争取和平统一的前景。
A. 和平统一
B. 和平方式
C. 中国人不打中国人
D. 一国两制
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纳税质押自纳税担保书和纳税担保财产清单经税务机关确认和质物移交之日起生效。
A. 正确
B. 错误
Which of these statements about PIM join messages in classic PIM-SM is correct？（）
A. PIM join messages are sent every 60 seconds to refresh the upstream router’s mroute state for the multicast tree.
B. Routers send a PIM join acknowledgement in response to each PIM join message received from a downstream router.
C. PIM join messages are only sent when the multicast distribution tree is first being established.
D. PIM join messages are sent every three minutes to refresh the upstream router’s mroute state for the multicast tree.
IOS智能手机系统时苹果公司专用的手机操作系统。
A. 正确
B. 错误
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