当电动机转速为零时,加上额定电压而启动瞬时线电流为额定启动电流。()
查看答案
话到嘴边想说却忘了要说什么,这属于()。
A. 语言障碍
B. 编码错误
C. 存储失败
D. 提取失败
You execute the following command in your Supportcenter.cn production database to change the width of the CUST_NAME column of the CUSTOMERS table: ALTER TABLE customers MODIFY (cust_nameVARCHAR2 (40)) / When you execute the command, it displays the following error message: ERROR at line 1: ORA-00054: resource busy and acquire with NOWAIT specified What could be the reason for the error message?()
A. The database instance is not available.
B. The ALTER TABLE command does not have WAIT option
C. The table or a row in the table is currently locked by another user session.
D. The database instance is busy processing other user sessions commands.
E. The CUSTOMERS table has no long running query active at the time when this request is made.
F. The server process executing the ALTER TABLE command is busy with another command executio
药房药品的摆放的一般原则是()
A. 药品定位存放
B. 药品非定位存放
C. 按有效期前后摆放
D. 同种药物不同有效期混放
E. 拆零药物混放