（）is based on logistics network, but more computerized and systematized than logistics operation .

A . Virtual logistics B . Imaginary logistics C . Thinking logistics D . Logistics planning

A . logistics integration B . Logistics industry C . Logistics center D . Logistics Park

A . 1200*1000mm B . 2591*2438mm C . 600*400mm D . A, B and C

A . plane tangent at one point B . cylinder tangent at one parallel C . cone tangent at one parallel D . series of cones tangent at selected parallel

A . lowest cost B . highest bandwidth C . lowest hop-count D . path attributes E . lowest delay

A . 802.11e B . 802.11k C . 802.11i D . 802.11h

A . plane tangent at one point B . cylinder tangent at the equator C . cone tangent at one parallel D . infinite series of cones tangent at selected parallel

A . lowest B . highest C . basic D . medium

A . logistics integration B . logistics industry C . logistics center D . logistics park

A . True B . False

A .  no B .  netpmon C .  entstat D .  nfso

A . Virtual logistics B . Imaginary logistics C . Thinking logistics D . Logistics planning

A . a fictitious sun moving along the celestial equator B . the visible sun moving along the ecliptic C . the Moon's motion in relation to the Sun D . the movement of the first point of Arie

A . a star B . a dot C . a dash D . a circle

A．A.configuration of static MAC B．B.configuration of permanent ARP C．C.IP interface D．D.VLAN interface

A．the ground tests B．the stress man's calculations C．the flight tests D．all of the above

Symmetric, or private-key, encryption is based on a secret key that is shared by both communcating parties. The （） party uses the secret key as part of the mathematical operation to encrypt （） text to cipher text. The receiving party uses the same secret key to decrypt the cipher text to plain text. Asymmetric, or public-key, encryption uses two different keys for each user: one is a （） key known only to this one user; the other is a corresponding public key, which is accessible to anyone. The private and public keys are mathematically related by the encryption algorithm. One key ia used for encyption and the other for decryption, depending on the nature of the communication service being implemented. In addition, public key encryption technoligies allow digital （） to be placed on messages. A digital signature uses the sender&39;s private key to encrypt some portion of the message. When the message is received, the receiver uses the sender&39;s （） key tp decipher the digital signature to verify the sender&39;s identity. A.host B.terminal C.sending D.receiving A.plain B.cipher C.public D.private A.plain B.cipher C.public D.private A.interpretation B.signatures C.encryption D.decryption A.plain B.cipher C.public D.private

A．Multi-view projection B．Isometric drawing C．Cabinet drawing D．Cartographical projection E．Perspective projection 此题为多项选择题。