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【单选题】
已知(3x+2y)+(5x+y)i=17+12i,其中x,y∈R,则( )A.
x=1,y=-7
B.
x=1,y=7
C.
x=-1,y=7
D.
x=-1,y=-7
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举一反三
【单选题】Of all the books on the shelf, is of any use for improving our practical skills of survival in the competitive world.
A.
nothing
B.
no one
C.
neither
D.
none
【单选题】Of all the books on the desk, is of any use for our study.
A.
nothing
B.
no one
C.
neither
D.
none
【简答题】Of all the books on the desk, ____ is of any use for our study. A.nothing B.no one C.neither D.none
【单选题】Of all the books on the desk, isof any use f
A.
31.Of all the books on the desk, isof any use for our study. （ ( 四川 ) ） A.nothing
B.
noone
C.
neither
D.
none
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