Bob Bjork described a set of manipulations that are collectively called \desirable difficulties.\ Which one of the following does not belong in this set?Bob Bjork描述了统称为“desirable difficulties（适当的挑战/困难）”的一系列操作。以下哪项不在其列？

A . Fine,thank you. It is really an interesting project B . Thank you,John. It is really an interesting project C . My pleasure,It is really an interesting project

A . The DESCRIBE DEPT statement displays the structure of the DEPT table. B . The ROLLBACK statement frees the storage space occupies by the DEPT table. C . The DESCRIBE DEPT statement returns an error ORA-04043: object DEPT does not exist. D . The DESCRIBE DEPT statement displays the structure of the DEPT table only if there is a COMMIT statement introduced before the ROLLBACK statement.

A . Lacings B . Lays C . Strands D . Twine

A . The LOW setting enables broadcast storm control， but has no effect on the number of devices that can connect to a switch port B . The LOW setting enables broadcast storm control and limits the number of devices that can connect to a switch port. C . The LOW setting disables broadcast storm control but limits the number of devices that can connect to a switch port D . The default network setting is "HIGH&quot

A . has no more than two compartments B . has two compartments in addition to the engine room C . will sink if any two compartments are flooded D . will float if any two adjacent compartments are flooded

A . The DESCRIBE DEPT statement displays the structure of the DEPT table. B . The ROLLBACK statement frees the storage space occupied by the DEPT table. C . The DESCRIBE DEPT statement returns an error ORA-04043: object DEPT does not exist. D . The DESCRIBE DEPT statement displays the structure of the DEPT table only if there is a COMMIT statement introduced before the ROLLBACK statement.

A . Automatic statistics collection is stopped for the CUSTOMERS table. B . Statistics for the CUSTOMERS table are locked and cannot be overwritten. C . Existing statistics for the CUSTOMERS table become unusable for the query optimizer. D . Subsequently， statistics gathered on the CUSTOMERS table are stored as pending statistics.

A . A role can be given to a maximum of 1000 users. B . A user can have access to a maximum of 10 roles. C . A role can have a maximum of 100 privileges contained in it. D . Privileges are given to a role by using the CREATE ROLE statement. E . A role is a named group of related privileges that can be granted to the user. F . A user can have access to several roles, and several users can be assigned the same role.

A .  It is compatible with all wireless clients. B .  It reduces roaming latency through reduced client RF channel scanning enhancements. C .  It reduces roaming latency to targeted times of less than 75ms. D .  Roaming occurs without reauthentication through a centralized RADIUS server. E .  It is enabled through WLSE deployment.

A . The MANDATORY location must be a flash recovery area. B . The optional destinations may not use the flash recovery area. C . This setting is not allowed because the first destination is not set as MANDATORY. D . The online redo log file is not allowed to be overwritten if the archived log cannot be created in the fourth destination.

A . The DESCRIBE DEPT statement displays the structure of the DEPT table. B . The ROLLBACK statement frees the storage space occupies by the DEPT table. C . The DESCRIBE DEPT statement returns an error ORA-04043: object DEPT does not exist. D . The DESCRIBE DEPT statement displays the structure of the DEPT table only if there is a COMMIT statement introduced before the ROLLBACK statement.

A .  1. Access point sends probe request .2. Client sends probe response.3. Client initiates  association.4. Access point accepts association.5. Client adds access point MAC address to  association table. B .  1. Client sends probe request.2. Access point sends probe response.3. Client initiates  association.4. Access point accepts association.5. Access point adds client MAC address to  association table. C .  1. Client sends probe request.2. Access point sends probe response.3. Access point initiates  association.4. Client accepts association.5. Access point adds client MAC address to association  table. D .  1. Access point sends probe request .2. Client sends probe response.3. Client initiates  association.4. Access point accepts association.5. Access point adds client MAC address to  association table. E .  1. Client sends probe request.2. Access point sends probe response.3. Client initiates  association.4. Access point accepts association.5. Client adds access point MAC address to  association table. F .  None of the other alternatives apply.

M: Of course, Madame. Here is the minutes of the meeting. The meeting was delayed by thirty minutes and started at 2 : 30 p. m. and it last for two and a half hours. W: Did you tell the chairman that I was very ill and couldn't attend？ M: Yes, I did. Also, here are all the reports and materials handed out in the meeting. I think you will have to do some replies. What does the man do？ A．He is a manager. B．He is a clerk. C．He is a secretary. D．He is a chairman.

M: Well you can talk to me now. Otherwise, I'm afraid you might have a long wait. I'm working on a paper. Q: What does the man mean？ (16) A．He won't be able to finish the work soon. B．The woman must wait for a long time. C．He will finish the paper soon. D．The woman can have a long talk with him

A．True. B．False.

B.off C.by D.away

A taken on B brought on C depended on D relied on

A．an B．a C．the

A. The DESCRIBE DEPT statement displays the structure of the DEPT table. B. The ROLLBACK statement frees the storage space occupies by the DEPT table. C. The DESCRIBE DEPT statement returns an error ORA-04043: object DEPT does not exist. D. The DESCRIBE DEPT statement displays the structure of the DEPT table only if there is a COMMIT statement introduced before the ROLLBACK statement.

(Fred = A ; Mr. Smith = B ; Bob = C) A: Oh, Mr. Smith, are you very busy？ B: Well, I was just going to give Bob a private lesson, but what&39;s the matter？ 56 __________ A: I must tell you my news. Jan has been chosen to play football for London against Oxford University. B: 57__________ He must be very pleased about it, isn&39;t he？ A: Yes, he is, although he doesn&39;t say much. The match is at three o&39;clock next Thurs- day. C: 58__________ . B : We mustn&39;t give no attention to our work, Bob. If you want to learn English, 59 __________. C : But sir, you needn&39;t sit in a classroom to learn English. Why, ! went to see a football match last Saturday and I learned a lot of words I had never heard in this classroom. B: 60 __________. A.Anything wrong with you？ B. That&39;s splendid ! C. you have to work, not to go watching football. D. You look very excited. E. I can quite believe it. F. I say, couldn&39;t we all go and see it and shout for Jan&39;s team？ G. you must pay much attention to listening and speaking. H. Don&39;t mention it. 56、请选择最佳答案填入() 57请选择最佳答案填入() 58请选择最佳答案填入() 59请选择最佳答案填入() 60请选择最佳答案填入()

是 否