人的心理是（） A.脑的功能 。 B.客观现实的反映 。 C.主观映象 。 D.由心脏产生的。
为什么说五六十年代农村题材小说创作具有得天独厚的优越条件？
婴儿游戏活动的最基本表现形式是（） 智力游戏。 活动性游戏。 音乐及娱乐游戏。 发展语言的游戏。
You notice a performance change in your production Oracle database and you want to know which change has made this performance difference. You generate the Compare Period Automatic Database Diagnostic Monitor (ADDM) report to further investigation. Which three findings would you get from the report?（） It detects any configuration change that caused a performance difference in both time periods.。 It identifies any workload change that caused a performance difference in both time periods.。 It detects the top wait events causing performance degradation.。 It shows the resource usage for CPU, memory, and I/O in both time periods.。 It shows the difference in the size of memory pools in both time periods.。 It gives information about statistics collection in both time periods.。
温度压力是影响爆炸极限的因素，当温度和压力增加时爆炸下限会（） 降低。 不变。 增大。
表示热轧光圆钢筋的符号为（）。
