The first phase of the stress response, or General Adaptation<br/>Syndrome is called the ( ). A: Resistance phase B: Adaptation phase C: Alarm phase D: Fight-or-flight phase

At a ( ) fault of the<br/>system, the non-fault phase voltage will increase with the<br/>zero-sequence impedance. A: three-phase fault B: double line-to-ground fault C: line-to-line fault D: single line-to-ground fault

‍The poor implementation of the performance planning phase will result in the poor implementation of the:‏‍‏ A: performance execution phase B: performance assessment phase C: performance review phase D: performance renewal and recontracting phase

The three-phase composition of soil refers to solid phase, liquid phase and gas phase

【单选题】The types of short-circuit in three-phase system are three-phase short-circuit, two-phase short-circuit, two-phase short-circuit grounding and single-phase short-circuit grounding. When the three phases of the system are short-circuited, they are still in the symmetrical stated. Other types of shorted circuit are asymmetric short circuit. Which of the following types is a symmetrical short circuit? A. Single phsae ground short circuit B. Three phase short circuit C. Two phase short circuit D. Two phase ground short circuit