鱼类中的碳水化合物主要存在形式是______。
A．双糖 B．单糖 C．麦芽糖 D．糖原
参考答案：D
—Could you tell me________？— He is in his office.
A．where Nick was
B．where is Nick
C．where was Nick
D．where Nick is
怎样买合脚的鞋？
