How is block-change tracking enabled？（）  

A . She is not very well. B . She is years old. C . She is very nice. D . She is as tall as I am.

A . By the On Scene Coordinator (OSC) B . By the Coast Earth Station (CES) controlling the distress communications on that frequency C . It is imposed by the Public Correspondence Station (PCS) controlling the distress communications on that frequency or channel D . It is imposed by the High Seas Service (HSS) controlling the distress communications on that frequency or channel

A . Fresnel units B . decibels C . EIRP D . milliamperes E . ohm

A . He is tall and beautiful B . He is very strict with us C . He is fine D . He is in an expensive car

A . I don't think so B . In fact he isn't C . Thank you D . You are not true

A . Ten o'clock. B . Ten yuan a kilo. C . I like it very much. D . I don't like.

A . The green one is better. B . Ten dollars and thirty cents. C . It's cheap. D . Yes. It's beautiful.

A .  alter database create block change tracking file B .  alter database enable block change file C .  alter database enable block change tracking using file ，/ora01/opt/ block_change_tracking.fil D .  alter system enable block change tracking using file ’/ora01/opt/block_ change_tracking.fil’ E .  alter system block change tracking o

A . Not at all B . It was nothing C . It doesn't matter. D . Just so so.

A、description B、narration C、exposition D、argumentation

A．how is she B．where is she C．how she is D．where she is

A．To measure amounts of rainfall. B．To check the accuracy of scales. C．To observe changes in the atmosphere. D．To calculate the density of other metals.

A．It's $14.99. B．It's $40.99. C．It's $14.19.

A．Ten dollars. B．Five dollars. C．Fifteen dollars.

A．She is in. B．She feels happy. C．She is sad.

A.C2 for a particular cell must be larger than zero for a mobile to be allowed to camp on that cell B.C2 is a quality check and if not fulfilled, the idle mobile must try another cell to camp on C.C2 and BSIC are reported to the serving cell, at least, once every five seconds to enable network controlled cell re-selection D.At cell re-selection, the cell with the largest derived C2 is chosen to camp on E.C2 is set to yes, if both CB and CBQ are low

A．A.I don&39;t think so. B．B.Thank you. C．C.You are not tru D．D.In fact it isn&39;t.

A、I don&39;t think so. B、Thank you. C、You are not true. D、In fact it isn&39;t.