Tracking Down HIVIn the summer of 1980, a patient had a strange purplish spot removedfrom below his ear. It was Kaposi’s sarcoma, a rarefm of skin cancer. This patient also had lymph node swelling exhaustion.In November 1980, a Los Angeles immunologist ex

题目
Tracking Down HIV

　　In the summer of 1980, a patient had a strange purplish spot removedfrom below his ear. It was Kaposi’s sarcoma, a rarefm of skin cancer. This patient also had lymph node swelling exhaustion.In November 1980, a Los Angeles immunologist examined a young man who haddiseases linked to immune system malfunctions. The doct had a T-cell counttaken of the patient’s blood. T-cells are a type of white blood cell that playsa key role1 in immune responses. The patient had no helper T-cells.

　　By the end of 1980, 55 Americans were diagnosed with infectionsrelated to immune system breakdown; four had died. A year later the death tollwas 74. Intravenous drug users had T-cell abnmalities. People who hadreceived blood transfusions showed symptoms of immune system breakdown. By July1982, 471 cases of the disease, now called Acquired Immune Deficiency Syndrome(AIDS), had been repted; 184 people had died.

　　In April 1984, American virologist Dr. Robert Gallo isolated thepathogen, disease producer, responsible f2 AIDS. He called it HTLV-III. InParis, Dr. Luc Montagnier identified a virus he called LAV. An internationalpanel of scientists determined that both men had found the same virus. Itbecame known as Human Immunodeficiency virus (HIV). Blood banks began screeningf HTV in 1985, but by then about 29,000 people had been infected throughblood transfusions. Some 12,000 hemophiliacs had contracted HIV throughblood-clotting products. By 1995, 477,900 Americans had AIDS; 295,500 had died.

　　In 1996, researchers announced drugs that reduced HIV in infectedpeople. Today scientists are testing vaccines believe that if HIV can besuppressed, then perhaps it can be eradicated3, but it is still a race againsttime.

　　词汇：

　　spot n. 地点，斑点，斑块，青春痘

　　lymph n. 淋巴结

　　sarcoma n. 肿瘤，肉瘤，恶性毒瘤

　　exhaustion n. 衰竭，耗尽，精疲力竭

　　immunologist n. 免疫学家

　　malfunction n. 故障，失灵，疾病

　　count n. 计数，计算

　　infection n. 传染病，感染

　　breakdown n. 故障，衰弱，崩溃

　　toll n. 代价，死亡人数

　　intravenous drug n. 静脉注射药物

　　abnmalities n. (abnmality的复数形式)畸形，异常情况

　　blood transfusion n. 输血

　　symptom n. 症状

　　virologist n. 病毒学家

　　virus n. 病毒

　　panel n. 座谈小组，仪表板

　　hemophiliac n. 血友病患者

　　vaccine n. 疫苗

　　注释：

　　1.play a key role...扮演一个关键角色，有至关重要的作用

　　2.be responsible f...对……负责，是……的原因

　　3.can be eradicated可以被根除的

　　练习：
5.The wd u eradicated the last paragraph means ____.

　　A　made extreme

　　B　celebrated

　　C　remove by rubbing

　　D　gotten rid of entirely

相似考题

1.______________[A] catching[B] ignoring[C] missing[D] tracking

2.Which three tasks can be automatically performed by the Automatic Data Optimization feature ofInformation lifecycle Management (ILM)?()A. Tracking the most recent read time for a table segment in a user tablespaceB. Tracking the most recent write time for a table segment in a user tablespaceC. Tracking insert time by row for table rowsD. Tracking the most recent write time for a table blockE. Tracking the most recent read time for a table segment in the SYSAUX tablespaceF. Tracking the most recent write time for a table segment in the SYSAUX tablespace

3. The following output occurs on Router R1. IP SLA operation 1 uses an ICMP echo operation type, with default frequency of 60 seconds. The operation pings from address 1.1.1.1 to address 2.2.2.2. Which of the following answers is true reg arding IP SLA and object tracking on R1?（） R1# show track Track 2 IP SLA 1 state State is Up 3 changes, last change 00:00:03 Delay up 45 secs, down 55 secs Latest operation return code: OK Latest RTT (millisecs) 6 Tracked by: STATIC - IP - ROUTING 0A、The tracking return code fails after the SLA operation results in an ICMP echo failure three times.B、The tracking return code fails after the SLA operation results in an ICMP echo failure one time.C、After the tracking object fails, the tracking o bject moves back to an up state 45 seconds later in all cases.D、After moving to a down state, the tracking object moves back to an OK state 45 seconds after the SLA operation moves to an OK state.

4.You have not configured Oracle Managed Files (OMF) in your database. You do not want to scan the entire datafile every time an incremental backup is performed. You decide to enable the block change tracking feature. Which statement should you use to enable the block change tracking feature?（）A. ALTER DATABASE ENABLE BLOCK CHANGE TRACKING;B. ALTER SYSTEM ENABLE BLOCK CHANGE TRACKING USING FILE <path>;C. ALTER DATABASE ENABLE BLOCK CHANGE TRACKING USING FILE <path>;D. ALTER SYSTEM ENABLE BLOCK CHANGE TRACKING;

参考答案和解析
答案：D
解析：
5.D　本题为词义推断题，eradicate的本义为“根除”，本题的解题线索在最后一段最后一句话的前半句，即“Today scientists are testing vaccines believe that if HIV can besuppressed”，只要了解suppress的词义，即“抑制”，那么结合后面then(于是，那么)这个关联词就可以推断出后面的动词短语应该和“根治”有关，本题选项中的前三个选项均不含该意思，故答案为选项D。选项A为“成为极端”，选项B为“庆祝”，选项C为“通过摩擦被消除”，和前句大意均不相符。
更多“Tracking Down HIV ”相关问题

  • 第1题：

    You enabled block change tracking for faster incremental backups in your database. Which background process writes to the change tracking file？（）

    • A、 RBAL
    • B、 CKPT
    • C、 SMON
    • D、 PMON
    • E、 MMON
    • F、 CTWR
    • G、 DBWR

    正确答案:F

  • 第2题：

    You issued the following command： ALTER DATABASE ENABLE BLOCK CHANGE TRACKING；  What will be the result of issuing this command？（）

    • A、 The block change tracking feature is enabled， and the information about the system change number is written in the change tracking file.
    • B、 The block change tracking feature is enabled， and the information about the log sequence number is written in the change tracking file.
    • C、 The block change tracking feature is enabled， and the information about the blocks that are changed since the last backup is written in the change tracking file.
    • D、 The block change tracking feature is enabled， and the information about the locations of the datafiles and the online redo log files are written in the change tracking file.

    正确答案:C

  • 第3题：

    You have configured OMF in your database. You enabled the ALTER DATABASE ENABLE BLOCK CHANGE TRACKING； statement to enable the block change tracking feature.  What information will be written in the change tracking file？（）

    • A、 the system change number
    • B、 the locations of the redo log files
    • C、 the locations of the datafiles
    • D、 the physical location of all the database changes

    正确答案:D

  • 第4题：

    单选题
    You issued the following command： ALTER DATABASE ENABLE BLOCK CHANGE TRACKING；  What will be the result of issuing this command？（）
    A

     The block change tracking feature is enabled， and the information about the system change number is written in the change tracking file.

    B

     The block change tracking feature is enabled， and the information about the log sequence number is written in the change tracking file.

    C

     The block change tracking feature is enabled， and the information about the blocks that are changed since the last backup is written in the change tracking file.

    D

     The block change tracking feature is enabled， and the information about the locations of the datafiles and the online redo log files are written in the change tracking file.


    正确答案： B
    解析： 暂无解析

  • 第5题：

    多选题
    You performed an incremental level 0 backup of a database: RMAN > BACKUP INCREMENTAL LEVEL 0 DATABASE; To enable block change tracking after the incremental level 0 backup, you issued this command: SQL > ALTER DATABASE ENABLE BLOCK CHANGE TRACKING USING FILE ‘ /mydir/rman_change_track.f’; To perform an incremental level 1 cumulative backup, you issued this command: RMAN> BACKUP INCREMENTAL LEVEL 1 CUMULATIVE DATABASE; Which three statements are true?（）
    A

    Backup change tracking will sometimes reduce I/O performed during cumulative incremental backups.

    B

    The change tracking file must always be backed up when you perform a full database backup.

    C

    Block change tracking will always reduce I/O performed during cumulative incremental backups.

    D

    More than one database block may be read by an incremental backup for a change made to a single block.

    E

    The incremental level 1 backup that immediately follows the enabling of block change tracking will not read the change tracking file to discover changed blocks.


    正确答案： B,E
    解析： 暂无解析

  • 第6题：

    单选题
    You are managing an Oracle Database 10g database that uses Oracle Managed Files （OMF）. You enabled the block change tracking feature for the database. Which statement regarding the change tracking file is true？（）
    A

     One block change tracking file is created for each data file. By default， the file is created in DB_CREATE_FILE_DEST.

    B

     One block change tracking file is created for each data file. By default， the file is created in BACKGROUND_DUMP_DEST.

    C

     One block change tracking file is created for the database. By default， the file is created in DB_CREATE_FILE_DEST.

    D

     One block change tracking file is created for the database. By default， the file is created in BACKGROUND_DUMP_DEST.


    正确答案： A
    解析： 暂无解析

  • 第7题：

    单选题
    You have configured OMF in your database. You enabled the ALTER DATABASE ENABLE BLOCK CHANGE TRACKING； statement to enable the block change tracking feature.  What information will be written in the change tracking file？（）
    A

     the system change number

    B

     the locations of the redo log files

    C

     the locations of the datafiles

    D

     the physical location of all the database changes


    正确答案： B
    解析： 暂无解析

  • 第8题：

    单选题
    Which RMAN backup command is used to create the block-change tracking file？（）
    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 on


    正确答案： B
    解析： 暂无解析

  • 第9题：

    单选题
    You enabled block change tracking for faster incremental backups in your database. Which background process writes to the change tracking file？（）
    A

     RBAL

    B

     CKPT

    C

     SMON

    D

     PMON

    E

     MMON

    F

     CTWR

    G

     DBWR


    正确答案： B
    解析： 暂无解析

  • 第10题：

    单选题
    The following output occurs on Router R1. IP SLA operation 1 uses an ICMP echo operation type, with default frequency of 60 seconds. The operation pings from address 1.1.1.1 to address 2.2.2.2. Which of the following answers is true reg arding IP SLA and object tracking on R1?（） R1# show track Track 2 IP SLA 1 state State is Up 3 changes, last change 00:00:03 Delay up 45 secs, down 55 secs Latest operation return code: OK Latest RTT (millisecs) 6 Tracked by: STATIC - IP - ROUTING 0
    A

    The tracking return code fails after the SLA operation results in an ICMP echo failure three times.

    B

    The tracking return code fails after the SLA operation results in an ICMP echo failure one time.

    C

    After the tracking object fails, the tracking o bject moves back to an up state 45 seconds later in all cases.

    D

    After moving to a down state, the tracking object moves back to an OK state 45 seconds after the SLA operation moves to an OK state.


    正确答案： D
    解析： 暂无解析

  • 第11题：

    多选题
    To enable faster incremental backups, you enabled block change tracking for the database.Which two statements are true about the block change tracking file? （）(Choose two.)
    A

    Multiple change tracking files can be created for a database.

    B

    The change tracking file must be created after the first level 0 backup.

    C

    RMAN does not support backup and recovery of the change tracking file.

    D

    The database clears the change tracking file and starts tracking changes again, after whole database restore and recovery operations.


    正确答案： B,C
    解析： 暂无解析

  • 第12题：

    Which statement correctly describes the change tracking writer （CTWR） background process？（）

    • A、 It keeps track of changes in the background processes.
    • B、 It records the system change number （SCN） in the control file.
    • C、 It writes audit records for user changes to the change tracking file.
    • D、 It records any changes to the listened configuration in the listener.ora file.
    • E、 It records any changes to the database parameters in the change tracking file.
    • F、 It records the physical location of all the changes that are made to the database in the change tracking file.

    正确答案:F

  • 第13题：

    Which RMAN backup command is used to create the block-change tracking file？（）  

    • 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 on

    正确答案:C

  • 第14题：

    Which three tasks can be automatically performed by the Automatic Data Optimization feature ofInformation lifecycle Management (ILM)?（）

    • A、Tracking the most recent read time for a table segment in a user tablespace
    • B、Tracking the most recent write time for a table segment in a user tablespace
    • C、Tracking insert time by row for table rows
    • D、Tracking the most recent write time for a table block
    • E、Tracking the most recent read time for a table segment in the SYSAUX tablespace
    • F、Tracking the most recent write time for a table segment in the SYSAUX tablespace

    正确答案:A,B,C

  • 第15题：

    单选题
    You have not configured Oracle Managed Files (OMF) in your database. You do not want to scan the entire datafile every time an incremental backup is performed. You decide to enable the block change tracking feature.Which statement should you use to enable the block change tracking feature?（）
    A

    ALTER DATABASE ENABLE BLOCK CHANGE TRACKING

    B

    ALTER SYSTEM ENABLE BLOCK CHANGE TRACKING USING FILE

    C

    ALTER DATABASE ENABLE BLOCK CHANGE TRACKING USING FILE

    D

    ALTER SYSTEM ENABLE BLOCK CHANGE TRACKING


    正确答案： D
    解析： 暂无解析

  • 第16题：

    填空题
    LTE中的跟踪区也就是Tracking Area，简称TA，跟踪区编码称为TAC（Tracking Area Code）。跟踪区是用来（）和（）的区域。

    正确答案： 进行寻呼,位置更新
    解析： 暂无解析

  • 第17题：

    单选题
    You have not configured Oracle Managed Files （OMF） in your database. You do not want to scan the entire datafile every time an incremental backup is performed. You decide to enable the block change tracking feature. Which statement will you use to enable the block change tracking feature？（）
    A

     ALTER SYSTEM ENABLE BLOCK CHANGE TRACKING；

    B

     ALTER DATABASE ENABLE BLOCK CHANGE TRACKING；

    C

     ALTER SYSTEM ENABLE BLOCK CHANGE TRACKING USING FILE ；

    D

     ALTER DATABASE ENABLE BLOCK CHANGE TRACKING USING FILE ；


    正确答案： B
    解析： 暂无解析

  • 第18题：

    多选题
    Which two statements regarding the Wireless LAN Solution Engine （WLSE） are true？（）
    A

    To support fault and policy reporting，the WLSE requires a Wireless Control System （WCS）.

    B

    When WLSE detects an AP failure，it automatically increases the power and cell coverage of nearbyAPs.

    C

    WLSE requires the 2700 location appliance to offer location tracking.

    D

    WLSE can locate rogue APs and automatically shut them down.

    E

    WLSE configuration is done using the command line interface （CLI） or a WEB based template.


    正确答案： E,A
    解析： 暂无解析

  • 第19题：

    单选题
    You enable block change tracking. You issue the following command: BACKUP INCREMENTAL LEVEL 0 DATABASE; The next day, you issue the following command: BACKUP INCREMENTAL LEVEL 1 CUMULATIVE DATABASE; Which statement about the use of the change tracking file is true?（）
    A

    RMAN reads the block change tracking file only when it performs the incremental level 0 backup.

    B

    RMAN reads the block change tracking file when it performs both incremental backups.

    C

    RMAN reads the block change tracking file only when it performs the incremental level 1 backup.

    D

    RMAN does not read the block change tracking file when it performs either incremental backup.


    正确答案： A
    解析： 暂无解析

  • 第20题：

    单选题
    Which dynamic view displays the status of block-change tracking?（）
    A

    V$BLOCK_CHANGE 

    B

    V$BLOCK_CHANGE_TRACKING 

    C

    V$BLOCKCHANGE 

    D

    V$BLOCK_TRACKING


    正确答案： C
    解析： 暂无解析

  • 第21题：

    单选题
    You have not configured Oracle Managed Files （OMF） in your database. You do not want to scan the entire datafile every time an incremental backup is performed. You decide to enable the block change tracking feature.  Which statement should you use to enable the block change tracking feature？（）
    A

     ALTER DATABASE ENABLE BLOCK CHANGE TRACKING

    B

     ALTER SYSTEM ENABLE BLOCK CHANGE TRACKING USING FILE 

    C

     ALTER DATABASE ENABLE BLOCK CHANGE TRACKING USING FILE 

    D

     ALTER SYSTEM ENABLE BLOCK CHANGE TRACKING


    正确答案： C
    解析： 暂无解析

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