【简答题】While I was looking out of the window, I saw an old homeless man crossing the street, carrying a suitcase. Many times I looked on far away, feeling 36 for the homeless, but did nothing. I did 37 some ...
【多选题】考虑属性的文法G(S),其中说法正确的是()产 生 式 语 义 规 则S→XYZ Z.h := S.a X.c := Z.g S.b := X.d -2 Y.e := S.bX→x X.d :=2*X.cY→y Y.f := Y.e*3Z→z Z.g :=Z.h+1
【单选题】—Would you mind looking after my dog while I’m on vacation? —___________.
C.
Not at all ,I have no time
【单选题】While I was waiting for her, I killed time__________ looking in the show windows.A.by###SX
A.
While I was waiting for her, I killed time__________ looking in the show windows. A.by
【多选题】生铁、熟铁、钢的主要化学成分均为Fe,但他们之间的性能差别显著,主要原因是其中( )不同
【单选题】设z 1 , z 2 是复数, 则下列命题中的假命题是 ( )
【单选题】已知 . Z 表示复数Z的共轭复数,已知Z=1+i,则 ( Z . Z ) 3 =( )
【单选题】While l was waiting for her,I killed time__________ looking in the show windows.