封堵作业时，管径相同、压力相同的气管线与油管线相比，所需皮碗直径要（） 大一些。 小一些。 相同。 小1/2&Prime。
A user executes a query on the EMPtable， which contains thousands of rows， to get details about employees in one of the departments. The user receives the following error： SQL> SELECT ename FROM emp WHERE deptno=10 ORDER BY sal； SELECT ename FROM emp WHERE deptno=10 ORDER BY sal ERROR at line 1： ORA-01157： cannot identify/lock data file 201 - see DBWR trace file ORA-01110： data file 201：’/u01/app/oracle/oradata/orcl/temp01.dbf’ What is a possible reason？（） The tempfile belonging to the default temporary tablespace is missing.。 The database is opened in restricted mode， so queries are not allowed。 The default temporary tablespace required to execute the query is offline.。 The default temporary tablespace required to execute the query is dropped.。 The default temporary tablespace required to execute the query is read-only.。
论述往复式压缩机润滑的目的。
协调性训练程序中错误的是：（） 从简单的动作开始。 先做容易完成的大范围、快速的动作。 熟悉后再做小范围、缓慢动作的训练。 先睁眼训练后闭眼训练。 应从两侧上肢同时动作开始。
Identify the memory component from which memory may be allocated for: （） 1: Session memory for the shared server 2: Buffers for I/O slaves 3: Oracle Database Recovery Manager (RMAN) backup and restore operations Large Pool。 Redo Log Buffer。 Database Buffer Cache。 Program Global Area （PGA）。
防水卷材起鼓的原因是（）
