地基基础工程中常见的质量通病有（）。 A.地基不均匀沉降 。 B.预应力砼管桩桩身断裂 。 C.挖方边坡塌方 。 D.基坑（槽）回填土沉陷。
Exhibit： Using Database Control， you have scheduled a job to shrink the TRANStable residing on the TTtablespace. The job would run at 5：00 p.m. every Friday.When you examine the space usage of the table after the completion of the job， you find that the table has not been shrunk. What could have been the reason for this？（） The tablespace that contains the TRANS table is online.。 The tablespace that contains the TRANS table is permanent.。 The tablespace that contains the TRANS table is locally managed.。 The segment space management of the tablespace that contains the TRANS table is manual in nature.。
基础接地体：建、构筑物基础中地下混凝土结构中的（）和预埋的接地体。 接地金属构件。 接地线。 避雷针。 避雷线。
Your database supports an online transaction processing (OLTP) application. The application is undergoing some major schema changes, such as addition of new indexes and materialized views. You want to check the impact of these changes on workload performance. What should you use to achieve this?（） Database replay。 SQL Tuning Advisor。 SQL Access Advisor。 SQL Performance Analyzer。 Automatic Workload Repository compare report。
从材料角度区分，能判断儿童是否正在游戏的一个指标是（） 玩具的逼真程度。 有无许多玩具。 有无玩具或游戏材料。 玩具的贵贱。
H2爆炸极限为4.0～7.4%，CH4爆炸极限为5～15%两者相比（）的危险性大
