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五六十年代历史剧有哪三种类型？请举例说明。

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假设需要更改表名“CUSTOMER”为“CUSTOMER_CHANGE”，可以使用（）语句。

ALTER TABLE CUSTOMER RENAME CUSTOMER_CHANGE
B. ALTER TABLE CUSTOMER RENAME TO CUSTOMER_CHANGE
C. RENAME TABLE CUSTOMER TO CUSTOMER_CHANGE
D. RENAME TABLE CUSTOMER CUSTOMER_CHANGE

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贵阳市成为我国冬雨中心，是因为它处在（）锋的（）一侧。

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如果病人出现严重的肾功能衰竭，应严格限制蛋白质的摄入，每天摄入量应为（）。

A. 0.5g/kg
B. 1g/kg
C. 0.8g/kg
D. 1.5g/kg

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OSPF is enabled on router A. You execute the following command on router A and receive theaccompanying output:RouterA#ping 224.0.0.5 repeat1Type escape sequence to abort.Sending 1, 1 00 - byte ICMP Echos to 224.0.0.5, timeout is 2 seconds:Reply to request 0 from 10.100.100.1, 4 ms10.100.100.1 is the IP address of a loopback interface on router A. What can you conclude about router A?（）

A. Only the router A loopback interface is parti cipating in the OSPF routing process
B. None of the router A interfaces are participating in the OSPF routing process
C. Router A is using the loopback interface IP address as its OSPF router ID
D. Router A does not have any reachable OSPF neighbor

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