刺激Threshold指的是A．用最小刺激强度，刚刚引起组织excitation的最短作用时间B．保持一定的刺激强度不变，能引起组织excitation的最适作用时间C．保持一定的刺激时间和强度-时间变化率，引起组织发生excitation的最小刺激强度D．刺激时间不限，能引起组织最大excitation的最小刺激强度
刺激Threshold指的是
A．用最小刺激强度，刚刚引起组织excitation的最短作用时间
B．保持一定的刺激强度不变，能引起组织excitation的最适作用时间
C．保持一定的刺激时间和强度-时间变化率，引起组织发生excitation的最小刺激强度
D．刺激时间不限，能引起组织最大excitation的最小刺激强度
参考答案和解析
C (答案：C)固定刺激的持续时间和强度时间变化率，刚能引起组织兴奋的最小刺激强度称为刺激的阈值，是衡量组织兴奋性大小的较好指标。
相关考题：
以下哪个参数可以调整2A事件触发的难易度() A.Absolute Threshold of the Quality ofthe Currently Used FrequencyB.Absolute Threshold of the Quality ofthe Non-used FrequencyC.HysteresisD.Weight of the Currently Used Frequency
以下哪个参数可以调整2A事件触发的难易度（）A、Absolute Threshold of the Quality ofthe Currently Used FrequencyB、Absolute Threshold of the Quality ofthe Non-used FrequencyC、HysteresisD、Weight of the Currently Used Frequency
While setting up the threshold for tablespace space usage metrics for one of your tablespaces， you define the critical threshold as 60% and warning threshold as 75%. What would be the result of this setting？（）A、 It would result in an error because the warning threshold cannot be more than the critical threshold.B、 The warning threshold is ignored and alerts would be generated when space usage exceeds the critical threshold.C、 The critical threshold is ignored and alerts would be generated when space usage exceeds the warning threshold.D、 Both threshold values are used and alerts are generated when space usage exceeds the respective threshold values.
When optimizing a standalone point-to-multipoint bridge installation with eight non-root bridges. Which of the following rts threshold and cwmin settings would be correct for the non-root bridges？（）A、rts threshold=4000，cwmin=3B、rts threshold=1，cwmin=4C、rts threshold=4000，cwmin=5D、rts threshold=1，cwmin=5
The warning and critical threshold values have been set to 85% and 97%， respectively， for one of the tablespaces. The current tablespace space usage is 54%. You modify the warning threshold to be 50 % and critical threshold to be 53% in Database Control. Which statement is true？（）A、 The new setting would be applied but no alerts would be raised immediately.B、 The new setting would be applied and an alert would be raised immediately.C、 The new setting would be ignored because the tablespace space usage is more than the specified threshold value.D、 The new setting would cause an error because the tablespace space usage is more than the specified threshold value.
View the Exhibit to examine the output of the DBA_OUTSTANDING_ALERTS view. After 30 minutes， you executed the following command： SQL SELECT reason，metric_value FROM dba_outstanding_alerts； REASON METRIC_VALUE ------------------------------------------------------------ ------------ Tablespace [TEST] is [28 percent]full 28.125 What could be the reason for the elimination of the other rows in the output（）A、An Automatic Workload Repository snapshot has been taken recently.B、The non-threshold-based alerts are transferred to DBA_ALERT_HISTORY.C、The threshold alerts conditions are cleared and the alerts are transferred to DBA_ALERT_HISTORY.D、The threshold alerts related to database metrics are permanently stored in DBA_ALERT_HISTORY but not the threshold alerts related to instance metrics.
While setting up the thresholds for tablespace space usage metrics for one of your tablespaces， you define the critical threshold as 60% and warning threshold as 75%. What would be the result of this setting？（）A、It would result in an error because the warning threshold cannot be more than the critical threshold.B、The warning threshold is ignored and alerts would be generated when space usage exceeds the critical threshold.C、The critical threshold is ignored and alerts would be generated when space usage exceeds the warning threshold.D、Both threshold values are used and alerts are generated when space usage exceeds the respective threshold values.
穿越跑道入口高。（）A、Threshold Crossing Height.B、Threshold Crossing Altitude.C、Runway End Crossing Altitude.D、Runway End Crossing Height.
单选题View the Exhibit that sets the threshold for the Current Open Cursors Count metric.Why is the Significance Level threshold type not available in the threshold setting?（）A because AWR baseline is not enabledB because Current Open Cursors Count is not a basic metricC because the STATISTICS_LEVEL parameter is set to BASICD because the AWR baseline is a system-defined moving window baseline
单选题While setting up the threshold for tablespace space usage metrics for one of your tablespaces， you define the critical threshold as 60% and warning threshold as 75%. What would be the result of this setting？（）A It would result in an error because the warning threshold cannot be more than the critical threshold.B The warning threshold is ignored and alerts would be generated when space usage exceeds the critical threshold.C The critical threshold is ignored and alerts would be generated when space usage exceeds the warning threshold.D Both threshold values are used and alerts are generated when space usage exceeds the respective threshold values.
单选题View the Exhibit to examine the metrics with a threshold.Which statement is true regarding the Number of Transactions (per second) metric?（）A Oracle uses statistical relevance to determine when an adaptive threshold has been breached for the metric.B The statistics for the metric values observed over the baseline time period are not examined to determine threshold values.C Oracle determines when an adaptive threshold has been breached based on the maximum value captured by the baseline.D The total concurrent number of threshold violations, which must occur before an alert is raised for the metric, has been set to zero.
单选题You have set Tablespace Full Metrics Threshold values for the USERS tablespace as follows： Warning （%）： 90 Critical （%）： 95 Which background process is responsible for issuing alerts when the threshold is crossed（）ASystem monitor （SMON）BProcess monitor （PMON）CMemory manager process （MMAN）DManageability Monitor process （MMON）
单选题The warning and critical threshold values have been set to 85% and 97%， respectively， for one of the tablespaces. The current tablespace space usage is 54%. You modify the warning threshold to be 50% and critical threshold to be 53% in Database Control. Which statement is true？（）AThe new setting would be applied but no alerts would be raised immediately.BThe new setting would be applied and an alert would be raised immediately.CThe new setting would be ignored because the tablespace space usage is more than the specified threshold value.DThe new setting would cause an error because the tablespace space usage is more than the specified threshold value.
单选题While setting up the thresholds for tablespace space usage metrics for one of your tablespaces， you define the critical threshold as 60% and warning threshold as 75%. What would be the result of this setting？（）AIt would result in an error because the warning threshold cannot be more than the critical threshold.BThe warning threshold is ignored and alerts would be generated when space usage exceeds the critical threshold.CThe critical threshold is ignored and alerts would be generated when space usage exceeds the warning threshold.DBoth threshold values are used and alerts are generated when space usage exceeds the respective threshold values.
单选题You want to be notified when the space usage of an existing critical tablespace has reached 75% of the allocated space. Which option would you use to achieve this？（）Arun a procedure to check the tablespace space usageBdefine the warning threshold for the tablespace at 75% in Database ControlCcreate a trigger to be executed when tablespace space usage reaches 75%Dsubmit a job by using DBMS_JOB package to check the free space in the tablespace at regular intervalsEdefine the warning threshold to be 75% for the tablespace by ALTER TABLESPACE .. ADD THRESHOLD command
单选题When optimizing a standalone point-to-multipoint bridge installation with eight non-root bridges，which of the following RTS threshold and CWmin settings would be correct for the non-root bridges？（）ARTS threshold = 4000， CWmin = 3BRTS threshold = 1， CWmin = 4CRTS threshold = 4000， CWmin = 5DRTS threshold = 1， CWmin = 5