设有文法G(T): T→Qc|c Q→Rb|b R→Ta|a 说明文法G(T)是否为递归文法,为什么?
设有文法G(T): T→Qc|c Q→Rb|b R→Ta|a 说明文法G(T)是否为递归文法,为什么?
设有文法G(T): T→Qc|c Q→Rb|b R→Ta|a 说明文法G(T)是否为递归文法,为什么?
A.(T*F)
B.T*F
C.P↑
D.P↑(T*F)
A.BCNF
B.3NF
C.2NF
D.1NF
Choose the BEST TERM to match the definition and translate the selected term into Clunese.
A) Ablation L) Nanocomposites
B) Adhesion M) Nettingindex
C) Cohesion N) Plasticizers
D) Degree ofcrystallinity O) Polymer
E) Dielectric constant P) Polymerization
F) Dielectric strength Q) Sealants
G) Fiberloading R) Semi-crystalline
H) Flameretardants S) Specific strength
I) Glass-transitiontemperature T) Viscoelasticity
J) Hysteresis U) Vulcanization
K) Monomers V) Whisker
A.②④⑥
B.⑤⑥⑩
C.①②③④
D.⑦⑧⑨
Can you identify the immediate etymological source of the following words? (For example,the immediate source of“meaning”is French,although the more remote source is Latin)能否确定下列词语的直接语源?(如:“meaning”的直接语源是法语,尽管它更远的来源是拉丁语) (a)air (b)barbecue (c)bungalow (d)Cola (e)gusto (f)babel (g)buffalo (h)cocoa (i)costume (j)ill (k)mule (l)decreed (m)revolution (n)benevolent (o)lie (p)topic (q)subject (r)theme (s)wind (t)datum