【单选题】Water formation volume factor ( ) 1.
【单选题】The formation volume factor of formation water is ( ) 1.
【判断题】The marginal product of factor 1 is the ratio of output to the amount of factor 1.
【多选题】Land, as a factor of production, may include ( )。
A.
the space occupied to carry out any production process, e.g. space for a factory
B.
the basic resources within land, sea or air which can be extracted, e.g. coal
C.
soil which can be used for agriculture
D.
holders of materials (pipes, vessels, containers etc.)
【单选题】简报是简报类文书的统称。作为一种信息报道形式,简报的具体名称有多种,下列文种属于简报的是 ( )。
【单选题】以发动机为动力的各种机械,在人类生产生活中应用极为广泛.从轮船、火车, 到拖拉机、摩托车等,它们的动力大都来源于内燃机,它们虽然在构造上略有差异,但工作原理都是一样的.下面对内燃机的有关叙述, 错误的是 ( )