A:互补商品
B:替代商品w.w.^w.k.&s.5*u.c.#om高.考.资.源.网
C:价值量相同的商品
D:使用价值相同的商品
根据汉语提示,完成句子。每空一词。(1)I prefer to receive a gift that has some ____ (心思) behind it.(2)The old lady____ (在…旁边) my mother is my grandmother.(3)Henry is____ (想知道) how his mother made so many dishes in such a short time.(4)People in Colombia are pretty____ (放松的) about time.(5)The dress was ____ (专门地) designed by the famous fashion designer.(6)Now he gets up early in the morning and never ____ (猛冲) to school.
a为负数,那么a,2a,-a的大小顺序是( )