Which one is the most ancient writing system？

A.Exploretheramificationofthechangebeforeimplementation.

B.Determinetheservicelevelagreementinplacebeforeimplementation.

C.Reviewtheequipmentdisposalproceduresandpoliciesbeforeimplementation.

D.Notifyallstaffmembersoftheplannedsystemoutagebeforeimplementation.

Which stage of the materials cycle is the most difficult for manufacturers to develop a full materials cycle?

  A) Extracting raw materials

  B) Manufacturing engineered materials

  C) Service ofproducts and systems

  D) Recycling/disposalmaterials

Which stage of the materials cycle is the most difficult for manufacturers to develop a full materials cycle?

  A) Extracting raw materials

  B) Manufacturing engineered materials

  C) Service ofproducts and systems

  D) Recycling/disposalmaterials

Which of the following is true of the heating system of the Johnstown campus? 查看材料

A.The heat is supplied by human bodies only．

B.The heat is supplied by both human bodies and other heat-emitting objects．

C.The heat is supplied by both human bodies and conventional fuel．

D.The heat is supplied by human bodies， other heat-emitting objects， and conventional fuel．

A、所有物质均线性流过产业系统 All material flow linearly through industrial systems

B、一些物质逐渐形成产业系统中的链状、网状等流动关系 Some materials are gradually linking industrial components as a chain or web in the industrial system

C、已经形成了物质在产业系统中的封闭循环流动关系 The materials has been enclosed in industrial system

D、产业系统中不可能形成物质的循环流动关系 It is impossible to form a material cycle in an industrial system

●Which is the second layer from the bottom in Open System Interconnection Reference Model? (71)．

(71) A. Application

B.Data link

C.Network

D.Session

Which one is the M diagram for the following system?

A、

B、

C、

D、

Which is the second layer from the bottom in Open System Interconnection Reference Model? （71）．

A.Application

B.Data link

C.Network

D.Session

Which of the following is the probable title of the passage?

A．The British Imperial System.

B．The Customary System.

C．The International System of Units.

D．The Metric System.

Which of the following tissue system is NOT one of the three major tissue systems in plants?

A、Meristem tissue

B、Ground tissue

C、Dermal tissue

D、Vascular tissue