13.比例尺是1:5000000表示地图上1cm距离相当于实际距离( )
A. | 50m | B. | 50km | C. | 5km |
12.某种饼干包装袋上显示“净含量:100±3g”,说明这袋饼干的质量是( )
0 159501 159509 159515 159519 159525 159527 159531 159537 159539 159545 159551 159555 159557 159561 159567 159569 159575 159579 159581 159585 159587 159591 159593 159595 159596 159597 159599 159600 159601 159603 159605 159609 159611 159615 159617 159621 159627 159629 159635 159639 159641 159645 159651 159657 159659 159665 159669 159671 159677 159681 159687 159695 199269
A. | 97g | B. | 103g | C. | 97~103g |