38 What is meant by "concert songs" in paragraph 7？

A . No literal value is substituted for a shared cursor.  B . Different execution plans are generated for substituted literal values.  C . The substitution of a literal value will produce different execution plans.  D . The substitution of any literal value will produce exactly the same execution plan.

A .  single layer of firewalling B .  multiple layers of firewalling C .  firewall connections in either an active or standby state D .  an architecture in which all traffic between firewalls goes through application-specific server

A . Having the vessel head toward the sea B . Running before a sea C . Being turned broadside to the sea D . Having the vessel filled with water

A . The — ssl level was not specified B . The server was not started with the – enable–ssl-plugin option C . — ssl is not a valid server option D . The mysqld binary was not compiled with SSL support E . The server's SSL certificate was invalid

A . Lowering the boom B . Raising the boom C . Spotting the boom over the deck D . Swinging the boom athwartshi

A . multiple layers of firewalling B . a method of operating firewalls from multiple vendors C . firewall connections in either an active or standby state D . an architecture in which all traffic between firewalls goes through application-specific servers E . an architecture in which all traffic between firewalls goes through application-specific gateway

A . Stopping the boom B . Topping or lowering the boom C . Moving the boom left or right D . All of the above

A . Bringing the anchor to short stay B . Heaving in all the chain C . Locking the windlass to prevent more chain from running out D . Paying out more chai

A . Lowering it into a cradle B . Placing it in a desired position C . Spotting it with wash primer and red lead D . Two-blocking it

A . The bottom block touches the top block B . The line has jumped the sheaves C . There are turns in the fall D . You have two block

A . HMAC-MD5 B . HMAC-SHA C . CBC-DES D . community string

A．Calculability B．Cancellability C．Non - detachability D．Non - conventionality

A．the amount of time that the writer spends writing a report B．the reader's unwillingness to make an effort to understand a report C．the amount of time that the reader spends reading any report D．the writer's difficulty in presenting reports in an easily-understood style

A.Having the vessel head toward the sea B.Running before a sea C.Being turned broadside to the sea D.Having the vessel filled with water

A．Extended contracts B．Superior security C．Free pickup D．Temperature control

A．Many UK teenagers are at risk of food poisoning because they fail to take simple precautions. B．Food poisoning in the UK is on the rise. C．Washing hands is important. D．British schools need to improve their sanitation levels in order to reduce instances of food poisoning.

A.The — ssl level was not specified B.The server was not started with the – enable–ssl-plugin option C.— ssl is not a valid server option D.The mysqld binary was not compiled with SSL support E.The server‘s SSL certificate was invalid

A．made the best out of the age he lived in B．was conscious of his age C．pursued his interests D．controlled his age