【判断题】纯虚函数是一个在基类中声明的没有具体内容的虚函数,为了实现多态(或接口功能),要求派生类定义自己的版 本。
【单选题】According to the passage, which of the following statements is TRUE?
A.
About 15 men disguised as Indians boarded British ships.
B.
The impetus of the American Revolution was the Treaty of Paris in 1776.
C.
The Stamp Act in 1764 was opposed by discontented colonists.
D.
A new tea tax in 1773 again consolidated Boston residents' disagreement.
【判断题】分配系数kA<1表示萃余相中A组分的浓度
【单选题】It is often difficult to______between a mere exaggeration and a deliberate lying.
【判断题】分配系数KA<1表示萃余相中A组分的浓度
【单选题】As a ____ professor at the university,he lectures on everything.
【判断题】分配系数kA<1表示萃余相中A组分的浓度<萃取相中A组分的浓度。