1 c and d are integer,is c even? (1) c(d+1)is even (2) (c+2)(d+4) is even answer C 2 B bought 2 stocks ,each one sold 96$, if B had a profit of 20% on the sale of one stock, but a loss of 20% on the sale of other stock,then on the sale of both stocks combined B had ..answer a loss of $8 3 -2x >3y,is x negative ? (1)y>0 (2) 2x+5y-20=0 answer D 第２个是怎么判断的呢？ 1 c and d are integer,is c even? (1) c(d+1)is even (2) (c+2)(d+4) is even answer C 2 B bought 2 stocks ,each one sold 96$, if B had a profit of 20% on the sale of one stock, but a loss of 20% on the sale of other stock,then on the sale of both stocks combined B had ..answer a loss of $8 3 -2x >3y,is x negative ? (1)y>0 (2) 2x+5y-20=0 answer D 第２个是怎么判断的呢？ | 
