[单选]
Given:

Which statement is true？（）

A . The code will compile without changes.
B . The code will compile if public Tree（） { Plant（）； } is added to the Tree class.
C . The code will compile if public Plant（） { Tree（）； } is added to the Plant class.
D . The code will compile if public Plant（） { this（"fern"）； } is added to the Plant class.
E . The code will compile if public Plant（） { Plant（"fern"）； } is added to the Plant class.

Automatic Shared Memory Management is disabled for your database instance. You realize that thereare cases of SQL statements performing poorly because of repeated parsing activity， resulting indegradation of performance. What would be your next step to improve performance？（） Run the SQL Access Advisor.。 Run the Memory Advisor for the sga.。 Run the Memory Advisor for the pga.。 Run the Memory Advisor for the shared pool.。 Run the Memory Advisor for the buffer cache.。纽曼的游戏特征的“三内说”认为，游戏的特征有（）内部控制。内部真实。内部自由。内部灵活。内部动机。 You are managing an Oracle Database 11g ASM instance having three disks in a disk group with ASM compatibility attribute set to 11.1.0 and redundancy set to high. One of the disks in the disk group becomes unavailable because of power failure. Which statements will be true in this scenario？（） The disk is immediately dropped from the disk group.。 The ASM tracks the extents that are modified during the outa。 The ASM migrates the extents from the unavailable disk to the remaining disks.。 The disk automatically goes offline.。双侧电源的输电线路两侧均装有检查同期重合闸，在运行中正确的运行方式为（）。两侧均投在检查同期位置。两侧均投在检查无压位置。一侧投在检查无压和同期位置，使两者的继电器接点并联，另一侧在检查同期位置上。一个三极管接在电路中，看不出它的型号，也无其它标志，但可测出它的三个电极的对地电位，分别为VA=-9v，VB=-6v，VC=-6.2v，则A端是（）。集电极。基极。发射极。

Given:

Which statement is true？（）

参考答案： D

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[单选] Given: Which statement is true？（）

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[单选]
Given:

Which statement is true？（）