下列化合物不属于糖异生的原料是
A．甘油B．氨基酸C．丙酮酸D．乳酸E．脂肪酸
参考答案：E
已知an=2-n+3，bn=2n-1，则满足anbn+1＞an+bn的正整数n的值为______．
"I've forgotten to bring my bread." "Never mind, you can have ______."[ ]
A. some of us
B. us some
C. some of ours
D. some of yours
