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【单选题】
室温较高时,有些试剂如氨水等,打开瓶塞的瞬间很出气液流,( ),再打开瓶塞。A.
先将试剂瓶在热水中浸泡一段时间
B.
振荡一段时间
C.
先将试剂瓶在冷水中浸泡一段时间
D.
先将试剂瓶颠倒一下
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【简答题】Threshold frequency for the photoelectric effect on lithium (f=2.93 eV) is _______________. If the the wavelength of the incident light is 380 nm, the stopping potential is _________________.
【单选题】Users are performing a large volume of inserts and deletes on the application tables in the APPS tablespace. You observe that there are several warning alerts being generated for the APPS tablespace s...
A.
Disable SQL tracing for the APPS tablespace.
B.
Disable logging attributes for the APPS tablespace.
C.
Modify the tablespace to be a dictionary-managed tablespace.
D.
Increase the critical threshold value for the tablespace space usage metrics for the APPS tablespace.
E.
Increase the warning threshold value for the tablespace space usage metric for the APPS tablespace.
【简答题】如果在开机后提示 “CMOS Battery State Low” ,有时可以启动,使用一 段 时间后死机,这种现象大多数时( ) 引起的。
【单选题】如果在开机后提示“CMOSBatteryStateLow”，时可以启动，使用一段时间后死机，这种现象大多数是（）引起的。
A.
操作系统问题
B.
启动顺序问题
C.
内存错误
D.
CMOS供电不足
【单选题】Users are performing a large volume of inserts and deletes on the application tables in the APPS tablespace. You observe that there are several warning alerts being generated for the APPS tablespace s...
A.
disable SQL tracing for theAPPS tablespace
B.
disable logging attribute for the APPS tablespace
C.
modify the tablespace to be a dictionarymanaged tablespace
D.
increase the critical threshold value for the tablespace space usage metrics for the APPS tablespace
E.
increase the warning threshold value for the tablespace space usage metrics for the APPS tablespace
【单选题】A student hypothesized that sounds of any intensity at a frequency of 105 Hz would be painful for humans to hear. Do the data in the figure support this hypothesis?
A.
Yes, because the threshold of pain is relatively constant with changes in frequency.
B.
Yes, because as frequency increases above 105 Hz, the threshold of pain increases.
C.
No, because humans cannot hear sounds at 105 Hz.
D.
No, because the threshold of pain is relatively constant with changes in frequency.
【简答题】如果在开机后提示“CMOS Battery State Low”，有时可以启动，使用一段时间后死机，这种现象大多数是引起的。
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