刮板输送机由机头、溜槽、档煤板、铲煤板、刮板链和机尾组成。
参考答案:对
●One of the main resposibilities of ICMP is to report().Although technology has produced increasingly reliable transmission media, errors still exist and must be handled.IP is an () protocol.This means that error checking and error control are not a concern of IP.ICMP was designed,in part,to compensate for this shortcoming.Howerver, ICMP does not() errors,it simply reports them.Error correction is left to the higher-level potocols.Error messages are always sent to the original () because the only information available in the datagram about the route is the source and destination IP addresses.ICMP uses the source IP address to send the error massage to the source of the () .
IP is an () protocol
A.reliable
B.unreliable
C.available
D.unavailable
阅读下列材料
材料一 “好在世界已经变得越来越小。已无新大陆可以发现。连南极冰层下的土地业已测量清楚,连大西洋中时隐时现的珊瑚岛也已记录在案。已有‘地球村’的说法。东方人、西方人,不过是‘地球村’中的‘鸡犬相闻’的村民而已。” ——冯骥才《献给命运的紫罗兰》
材料二:麦道公司在美国以外的零件供应地示意图:
材料三:漫画:资本的跨国运动
请回答:
(1)结合所学知识, 材料一中的“地球村”的说法反映了当今世界经济发展的什么趋势?(1分),出现这一趋势的根本原因是什么?(2分)面对这种趋势我们应该如何应对?(2分)
(2)读材料二分析,为什么麦道公司要如此多的国家为其生产飞机零部件?(3分)
(3)读材料三,假如你是一位投资家,你在进行投资时,你将考虑哪些投资条件?(2分)