A.a=-1
B.a>-1
C.a>0
D.-1<a<0<br>
第3题
B、a>=0,c=1, b=3, d<0;a<0, c="1," b="3,d">=0;a>0, c!=1, b!=3, d<0;a<=0, c!="1," b!="3," d>=0
C、a>0,c=1, b=3, d<0;a<=0, c="1,b=3,d">=0;a>0, c!=1,b!=3, d<0;a<=0, c!="1," b!="3," d>=0
D、a>0,c=1, b!=3, d<=0;a<=0, c="1," b="3,d">=0;a>0, c!=1, b!=3,d<0;a<=0, c!="1," b!="3," d>=0
第8题
A、
B、a=1,b=1,c=1
C、a=-1,b=-1,c=-1
D、a=-1,b=-1,c=0
第9题
A、A0,A1,A2,A3
B、A0,A1,A3,A2
C、A0,A2,A1,A3
D、A0,A3,A1,A2
第10题
图1-3电路,电流I为( ) (A)1 A (B)0 A (C)2 A (D)-2 A
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