【判断题】对齿轮泵而言,因为径向力不平衡产生的从动齿轮径向磨损大,主动齿轮径向磨损小。
【简答题】图所示系统的变压器中性点可以接地,也可以不接地。比较中性电直接接地系统与中性点非直接接地系统中发生单相接地以后,在下属方面的异同: 说出零序等值网络及零序参数的组成。
【判断题】因为N型半导体的多数载流子是自由电子,所以N型半导体带负电。
【单选题】which of the following is not the step of the selection of expatriates?
A.
evaluate the candidate’s personal traits
B.
the decision should be granted by the committee
D.
face to face interview
【简答题】图所示系统的变压器中性点可以接地,也可以不接地。比较中性电直接接地系统与中性点非直接接地系统中发生单相接地以后,在下属方面的异同: 对保护切除故障速度的要求有哪些?
【单选题】The selection of Jurors may not be determined by______.
B.
the lawyers of both parties
D.
the defense and the prosecution
【单选题】It can be inferred that the criterion/criteria for the selection of qualified candidates is/are ______.
A.
the qualification of the applicants
B.
the quality of the applicants' papers
C.
the number of the papers presented
D.
the abstract of the papers submitted
【单选题】Who would decide the selection of music for each film program in the past?
A.
The pianist of the orchestra,
D.
The conductor of the orchestra.