You executed the following SQL statement to shrink the EMPLOYEES table segment stored in the EXAMPLE tablespace: ALTER TABLE employees SHRINK SPACE CASCADE; Which statement is correct in this scenario?（） The data in the segment will be compacted but the high water mark will not be adjusted 。 The EMPLOYEES table will be changed to read-only mode during the shrink operation 。 The indexes created on the EMPLOYEES table will need to be rebuilt after the shrink operation is over。 The shrink behavior will be cascaded to all dependent segments of the table that support a shrink operation 。 Data manipulation language (DML) operations will not be possible on the EMPLOYEES table during the COMPACTION phase of the shrink operatio。
神经系统活动的基本过程是（）和（）
涂料防水层施工，在转角处、变形缝等部位应增加宽度不小于（）mm的胎体增强材料和增涂防水涂料。 200。 300。 400。 500。
柴油机压缩行程中压缩的是（）。 柴油与空气的混合气。 纯空气。 柴油蒸气。 柴油。
一直使用到现在的世界上最古老的文字是（）。
对L型钙通道选择性最低的钙拮抗剂是（）
