For which three events can web application event listeners be registered?()
A. When a session is created
B. After a servlet is destroyed
C. When a session has timed out
D. When a cookie has been created
E. When a servlet has forwarded a request
F. When a session attribute value is changed
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装接容量为315KVA的码头装卸作业动力用电,执行非工业电价。
A. 正确
B. 错误
The broadcast of MSI is made on two dedicated systems. “dedicated” means().
A. special
B. different
C. expensive
D. valuable