口服剂型中吸收最快的剂型是（）。
参考答案：液体制
The trouble is that not many students really know how to make use of their time to its best ________.
A．benefit
B．advantage
C．value
D．profit
在计算机键盘上的Tab键称为______。
A．删除键
B．转换键
C．空格键
D．制表键
