170.[x] is the least integer greater than or equal to x , is y>-3? (1) [y/2]=0 (2) [y/4]=0 我选A 条件一:因为[y/2]=0,所以-1<y/2<0 所以-2<y<0 充分 条件二:因为[y/4]=0,所以-1<y/4<0 所以-4<y<0 不充分 选A
170.[x] is the least integer greater than or equal to x , is y>-3? (1) [y/2]=0 (2) [y/4]=0 我选A 条件一:因为[y/2]=0,所以-1<y/2<0 所以-2<y<0 充分 条件二:因为[y/4]=0,所以-1<y/4<0 所以-4<y<0 不充分 选A