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【单选题】
下列对scala构造器的描述错误的是( )A.
构造器(constructor)又叫构造方法，是类的一种特殊的方法，它的主要作用是完成对新对象的初始化。
B.
Scala类的构造器包括： 主构造器 和 辅助构造器
C.
辅助构造器：函数的名称this, 可以有多个，编译器通过不同参数来区分。
D.
Scala构造器作用是完成对新对象的初始化，构造器具有返回值。
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【单选题】The main problem of insurance coverage for hospice care and active treatment is that______.
A.
it does not allow patients to seek both
B.
it only covers patients whose life expectancy is less than six months
C.
it deprives patients of the right to choose between two proven treatment methods
D.
hospice care is only covered when it may extend a patient's life expectancy
【单选题】At college, I ___________________ (play an active part) in various activities.
A.
played an active part
B.
play an active part
【单选题】The main difference between active transport and facilitated diffusion is:
A.
In active transport the molecules move from areas of high to areas of low concentration
B.
In active transport, you need carrier proteins
C.
In active transport you need ATP to move molecules against a concnetration gradient
D.
In active transport, only water molecules move.
【单选题】题目:The main active intermediates passed through the following reactions are ( )
A.
Carbon cation
B.
Carbon anion
C.
Carbene
D.
Nitroene
【简答题】____ 是沿道路中线所作的竖向剖面图。它反映沿途地面和路线在竖向的____和有关数据。
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