表述算术/逻辑部件的是（）。

设谓词P（x）：x是奇数，Q（x）：x是偶数，谓词公式∃x（P（x）∨Q（x））在哪个个体域中为真？（　　）

A、自然数

B、实数

C、复数

D、A，B，C均成立

（多选）下列等值式成立的有（　　）。

P→Q⇔¬Q→¬P

P∨（P∧R）⇔R

P∧（P→Q）⇔Q

P→（Q→R）⇔（P∧Q）→R

Which three circumstances would prevent traceroute from displaying the WAN IP addresses? （）(Choose three)

The WAN link is down.

IPSec is enabled on the WX.

Traceroute is enabled for compression.

The network is configured using static routes.

The local and remote cables are accidentally swapped.

Which three static objects are cached by the client-side WXC device?（） (Choose three.)

XML

HTML

JPEG

JavaScripts

Cascading Style Sheets

Which are the three levels at which the Segment Advisor generates advice?（）

block level 

object level 

schema level 

segment level 

tablespace level