不同记录的存货编码不能相同，同一张采购订单可以输入编号相同的存货。（)

Unlike more traditional embedded systems,a full-fledged CPS is typically designed as a () of interacting elements with physical input and output instead of as standalone devices.

A.system

B.mechanism

C.net

D.network

（）operating systems are used for handheld devices such as smart-phones.

A.MobileB.DesktopC.NetworkD.Timesharing

An embedded operating system is the(71)program that manages all the other programs in an embedded device after initial load of programs by a(an)(72). It normally guarantees a capability within a specified(73)size and(74)constraint as well as with application programs. It also n0rmalty has small foot print including initial boot loader, OS kernel, required device drivers,(75)for the user data and so forth. It has very-likely structure of a normal operating system however mainly differentiated by some factors such as type of pre-installed device, functional limits, taking designed job only.

A．hardware

B．business

C．software

D．external

d with thermostatic expansion valves？

A.At the designed operating temperature, the liquid refrigerant charge has changed to a vapor

B.The liquid refrigerant tends to collect at the bellows or diaphragm and reduces the valve sensitivity

C.The sensing bulb is empty of liquid refrigerant charge at the designed operating temperature

D.The sensing bulb is never emptied of liquid refrigerant under normal operating conditions

n embedded device after initial load of programs by a(an) （72）. It normally guarantees a certain capability within a specified（73） size and （74） constraint as well as with application programs. It also normally has small foot print including initial boot loader, OS kernel, required device drivers, （75） for the user data and so forth. It has very-likely structure of a normal operating system however mainly differentiated by some factors such as type of pre-installed device, functional limits, taking designed job only.

（71）A. hardware B. business C. software D. external

（72）A. driver B. application C. kernel D. boot loader

（73）A. data B. storage C. bus D. CPU

（74）A. time B. format C. controller D. packet

（75）A. JAFFS B. format C. file systems D. protocol

n embedded device after initial load of programs by a(an) （72）. It normally guarantees a certain capability within a specified（73） size and （74） constraint as well as with application programs. It also normally has small foot print including initial boot loader, OS kernel, required device drivers, （75） for the user data and so forth. It has very-likely structure of a normal operating system however mainly differentiated by some factors such as type of pre-installed device, functional limits, taking designed job only.

（71）A. hardware B. business C. software D. external

（72）A. driver B. application C. kernel D. boot loader

（73）A. data B. storage C. bus D. CPU

（74）A. time B. format C. controller D. packet

（75）A. JAFFS B. format C. file systems D. protocol

●An Embedded System is a (72)designed for specific control functions within a larger system.

(72) A． computer

B． program

C．computer system

D．tool

Modern operating systems usually come with a ().

A、application software

B、GUI

C、memory

D、printer

The operating medium for control systems may be _____.

A.compressed air

B.hydraulic oil

C.electricity

D.All of the above