温度
2004年1月，原告杨某（男）结识了被告韩某（女）。同年8月27日，韩某用手机发短信给杨某，向他借钱应急，短信中说：“我需要5000元，刚回北京做了眼睛手术，不能出门，你汇到我的卡里。”杨某见短信后立即将钱汇给了韩某。一周后，杨某再次收到韩某的短信，又借给其6000元并汇到了韩某的账户。因都是短信来往，两次汇款杨先生都没有索要借据。借了两次钱后，韩某非但没有还钱，反而继续向杨某借钱。杨某起了疑心，要求韩还钱。但几经催要，韩某只是发短信说：“我一定还，但需要等一段时间。”可韩某还是久欠未还，杨某逐将韩某告上了法庭。并提交了银行汇款单存单两张。但韩某却称这是杨先生归还以前欠她的欠款。法院审理认为，手机短信载明的款项数额、往来时间与杨某在银行的业务凭证相符，同时短信还载明了被告承诺偿还借款的意思表示，证据间相互印证，故可以认定被告向原告借款的事实。据此，法院判令被告韩某偿还原告人民币1.1万元。手机短信作为证据时的证据力受哪些因素的影响？
You notice that the performance of your production 24/7 Oracle database significantly degraded.Sometimes you are not able to connect to the instance because it hangs. You do not want to restart thedatabase instance.How can you detect the cause of the degraded performance?（） Enable Memory Access Mode, which reads performance data from SGA.。 Use emergency monitoring to fetch data directly from SGA analysis.。 Run Automatic Database Diagnostic Monitor (ADDM) to fetch information from the latest Automatic Workload Repository (AWR) snapshots.。 Use Active Session History (ASH) data and hang analysis in regular performance monitoring.。 Run ADDM in diagnostic mode.。
社会现代化
You work as a database administrator for Certkiller .com. The database is open. A media failure has occurred， resulting in loss of all the control files in your database. Which statement regarding the database instance is true in this scenario？（） The instance would hang.。 The instance needs to be shut down.。 The instance would be in the open state.。 The instance would abort in such cases.。 The instance would be in the open and invalid state.。 The instance would in the open state， but all the background processes will be restarted.。
下面这段代码中，变量myChar的结果是（）。
Dim myString As String = "ABCDE"
Dim myChar As Char
myChar = myString.Chars(3)
