【多选题】常见的可动辙叉的类型主要有( )、( )、( )
【单选题】What encourages firms to enter markets?
A.
The diversity of products offered must be small.
B.
Firms believe they can violate patent protection with impunity.
C.
No firms in the industry can experience losses.
D.
Some existing firms in the market must be earning economic profits.
【单选题】投入某种物质商品生产过程中的活劳动量不变,如果整个部门劳动生产率提高,在单位劳动时间内生产的商品数量和单个商品价值量之间,两者的变化表现为( )
【简答题】单开道岔的辙叉有几种类型,试述锰钢整铸式辙叉的优点。
【判断题】ZD6系列电动转辙机的表示杆有A型、D型、E型、J型、G型、F型、K型。各类型号的转辙机都有本机相对应的表杆杆,可以互换使用。()
【简答题】驼峰场使用的转辙机,按照动力的不同有分为哪几种类型的转辙机?
【单选题】What type of sentence is 'The result is that most of our so-called reasoning consists in finding arguments for going on believing as we already do.'?
B.
A coordinate sentence.
【多选题】近因原则在保险实务中应用时,如何确定损失近因,一般具体分析的情况有