若x、y互为倒数，则（-xy）²⁰¹³=______．

逻辑题

1. Guess the missing shape(形状)and the number.

Answer: ____________________________________________________

2. See if you can draw three overlapping rectangular boxes(重叠的方框),so that

you can divide(分开)the marbles(玻璃弹子)into rive groups. Each group has three

marbles.

Answer:_______________________________________________________