Perspective/pərˈspektɪv/（）

A.现货

B.远景;透视图

C.电子的

D.观点

A．are ; are

B．is ; are

C．is ;is

D．are ;is

A．speaking

B．spoken

C．to speak

D．speak

A.has been

B.has gone

C.goes

D.went

A．Is there anything I can do for you

B．I’ll be able to speak Chinese in another two months．

C．Where can he be

D．At that time I could read without spectacles．

A.speak

B.spoken

C.speaking

D.to speak

A．was staying

B．stays

C．staye

D．has stayed

A.(P∧Q∧R)∨(¬P∧Q∧¬R)

B.(P∧Q∧¬R)∨(¬P∧¬Q∧¬R)

C.(P∧Q∧R)∨(¬P∧¬Q∧¬R)

D.(P∧Q∧R)∨(¬P∧¬Q∧R)

确定一下各个文献书目信息的iPAC作者关键词字段的检索项：

① Qian Yingyi. The Institutional Foundations of China's Market Transition[C]. William S M ed. , Proceedings of the World Bank's Annual Conference on Development Economics, April 28 - 30, 1999 Washington, D. C. (New York: Wiley, 1999 ), 135 -146

② Sutcliffe JR. Smith. Empirical studies in multimedia information retrieval[C]. Maybury M Ted. , Current Studies on Information Retrieval and Database Technology. AAAI Press, Menlo Park,C A. 263 - 265

③ Abbey R, Richards M. A practical approach to commercial conveyancing & property [M]. Oxford University Press, 2003

④ Steffensmeier D. Making sense of recent U. S. movies trends, 1980 to 1998. Age composition effects and other explanations [C]. Selliseds T. The 21st century's movies art: research and perspective, Baltimore, MD: Williams & Wilkins, 1992:77 - 88

⑤ Ballard D. An Introduction to Natural Computing [M], MIT Press, Cambridge, MA,1999

A.Ø（P∨Q）∨R

B.（P∧Q）∨R

C.（P∨Q）∨R

D.（ØP∧ØQ）∨R

A.(P∧Q∧R)∨(¬P∧Q∧¬R)

B.(P∧Q∧¬R)∨(¬P∧¬Q∧¬R)

C.(P∧Q∧R)∨(¬P∧¬Q∧¬R)

D.(P∧Q∧R)∨(¬P∧¬Q∧R)