单项选择题
成人合理膳食中脂肪的适宜供能比是（）。
A.10%B.10—20%C.20—30%D.30—40%
问答题 翻译：She paid 5000 in cash for salary.
问答题 翻译：She purchased a used computer for￥3500 on credit by making a ￥1500 cash down payment and obtaining two－month accounts payable for the remaining￥2000.
问答题 翻译：She purchased materials of￥4000 in cash.
