为了使采集的土壤分析样品有代表性；对于坡耕地土壤，肥力不均匀的地块，土壤采样线路宜采用（）为好
A. 对角线
B. 平行线
C. 蛇形
D. 等高线
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已知一段信使RNA有30个碱基，其中A和C共有12个，那么转录成该信使RNA的一段DNA分子中应有多少个G和T的数量、该信使RNA经翻译而合成肽链时应脱去的水分子数分别是（）
A. 12和30
B. 30和29
C. 18和10
D. 30和9
You are configuring the PROD database to use an internal tuning algorithm to monitor the performance of the workload. To achieve this configuration， you specify the following parameter settings in the SPFILE： SGA_TARGET = 512M SHARED_POOL_SIZE = 256M Which two statements are true when modifying the SHARED_POOL_SIZE initialization parameter in the SPFILE？ （）
A. Modifying the SHARED_POOL_SIZE initialization parameter cannot be accomplished if the SGA_TARGET initialization parameter is set to a non-zero value.
B. Modifying the value of the SHARED_POOL_SIZE initialization parameter to zero is not allowed if the SGA_TARGET initialization parameter is set to a nonzero value.
C. Increasing the value of the SHARED_POOL_SIZE initialization parameter does not increase the shared pool component size. It sets the lower limit for the size of this component.
Decreasing the value of the SHARED_POOL_SIZE initialization parameter does not reduce the size of the shared pool component immediately. It sets the lower limit for the size of this component.
E. Increasing the value of the SHARED_POOL_SIZE initialization parameter immediately increases the shared pool component to the desired size by reallocating the additional memory from the auto-tuned memory components.
F. Decreasing the value of the SHARED_POOL_SIZE initialization parameter immediately shrinks the shared pool component to the desired size while reallocating the released memory to the memory components that are not auto-tuned.
公安消防部队思想政治教育考核评价结果分为（）等次。
A. 好
B. 较好
C. 一般
D. 较差
E. 差
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