It is ________ my old camera, so I have just bought a new one.[ ]

A. too expensive to repair

B. so expensive that repair

C. expensive enough to repair

D. too expensive that repair

某高校膳食调查结果显示，蛋白质日平均摄入量为60g，脂肪为70g，能量为 2400kcal，钙为480mg

脂肪供能占总能量的比例是

A．20%

B．23%

C．26%

D．28%

E．31%