手指气缸主要有平行手指气缸、()、旋转手指气缸和三点手指气缸等四种结构形式。
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MPLSLDP协议中包括哪些消息()
A. 发现(Discovery)消息
B. 会话(Session)消息
C. 通告(Advertisement)消息
D. 通知(Notification)消息
碳酸盐岩储层评价是根据测井资料划分出碳酸盐岩渗透层(裂缝带)之后,再根据孔隙度和自然伽马相对值将裂缝带划分为Ⅰ类、Ⅱ类、Ⅲ类层。
A. 正确
B. 错误
在下面的网络中,具有高速度、短距离、低误码特点的是()。
A. 广域网(WAN)
B. 城域网(MAN)
C. 局域网(LAN)
D. 万维网(WWW)
You created the ORDERS table in your database by using the following code: SQL> CREATE TABLE ORDERS (ORDER_DATE TIMESTAMP(0) WITH TIME ZONE); Then, you inserted data in the ORDERS table and saved it by issuing the following statements:SQL> INSERT INTO ORDERS VALUES(’18-AUG-00 10:26:44 PM America/New_York’); SQL> INSERT INTO ORDERS VALUES(’23-AUG-02 12:46:34 PM America/New_York’); SQL> COMMIT; Next, you issued the following statement to change the time zone for the database: SQL> ALTER DATABASE SET TIME_ZONE=’Europe/London’; What will be the result of executing the above statement?()
A. The statement will fail.
B. The statement will be executed successfully, and the new time zone will be set for the database.
C. The statement will be executed successfully, but the new time zone will be set for the current session.
D. The statement will be executed successfully, but the new time zone will neither be set for the database nor for a specific session.