与“y=(x>0?1:x0)y=1; else if(x0)y=1; else if(xO)y=1; else if(x=-0)y=0; else y=-l;
D.y=0; if(x>=0) if(x>=0)y=1; else y=-l;
第1题
A.if(x>0)y=1; else if(x<0)y=-1; else y=0; else y=0;
B.if(x) if(x>0)y=1; else if(x<0)y=-1;
C.y=-1; if(x) if(x>0)y=1; else if(x==0)y=0; else y=-1;
D.y=0; if(x>=0) if(x>0)y=1; else y=-1:
第2题
A.if(x>0)y=1 else if(x<0)y=-1; else y=O;
B.if(x) if(x>0)y=1; else if(x<0)y=-1;
C.y=-1; if(x) if(x>0)y=1; else if(x==0)y=0; else y=-1;
D.y=0; if(x>=0) if(x>0)y=1; else y=-1;
第3题
A、y=0; if (x!=0) if(x>0) y=1; else y=-1;
B、if (x>=0) y=0; if(x) y=1; else y=-1;
C、y=0; if (x>=0) if(x) y=1; else y=-1;
D、if (x != 0) if (x > 0) y = 1; else y = -1;
第4题
A、if(x > 0) y = 1; else if(x == 0) y = 0; else y = -1;
B、y = 0; if(x > 0) y = 1; else if(x < 0) y = -1;
C、y = 0; if(x >= 0); if(x > 0) y = 1; else y = -1;
D、if(x >= 0) if(x > 0) y = 1; else y = 0; else y = -1;
第5题
A、if(x > 0) y = 1; else if(x == 0) y = 0; else y = -1;
B、y = 0; if(x > 0) y = 1; else if(x < 0) y = -1;
C、y = 0; if(x >= 0); if(x > 0) y = 1; else y = -1;
D、if(x >= 0) if(x > 0) y = 1; else y = 0; else y = -1;
第6题
A、if(x > 0) y = 1; else if(x == 0) y = 0; else y = -1;
B、y = 0; if(x > 0) y = 1; else if(x < 0) y = -1;
C、y = 0; if(x >= 0); if(x > 0) y = 1; else y = -1;
D、if(x >= 0) if(x > 0) y = 1; else y = 0; else y = -1;
第7题
A、y=0; if (x!=0) if(x>0) y=1; else y=-1;
B、if (x>=0) y=0; if(x) y=1; else y=-1;
C、y=0; if (x>=0) if(x) y=1; else y=-1;
D、if (x != 0) if (x > 0) y = 1; else y = -1;
第9题
A.if(x>0)y=1; else if(x<0)y=1; else y=0;
B.if(x) if(x>0)y=1; else if(x<0)y=-l; else y=0;
C.y=-l if(x) if(x>O)y=1; else if(x=-0)y=0; else y=-l;
D.y=0; if(x>=0) if(x>=0)y=1; else y=-l;
第10题
D、y=0; if(x>=0) if (x>0) y=1; else y=-1;
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