个人对商品的需求需要具备()的条件。
A.个人购买意愿
B.所购买的商品有使用价值
C.个人具有支付能力
D.个人有稳定的收入
参考答案：A, C
－Do you know ?
－Yes. She said she was in Sanya.
A．where Mrs White spent her holidays
B．where did Mrs White spend her holidays
C．where will Mrs White spend her holidays
D．where Mrs White will spend her holidays
糖代谢供能约占人体中总耗能（）
A.20%
B.40%
C.60%
D.80%
E.100%
