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

To be effective, the three phases of the writing process must be performed in sequence, moving from Phase 1 to Phase 2 to Phase 3 in order.

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

Which of the following is not a CT phase of COVID-19? A: Early phase B: General phase C: Progressive phase D: Critical phase E: Resolutive phase

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

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

‍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 hypothetical state of drawing small molecules by software is A: Vacuum gas phase B: Atmospheric liquid phase C: Atmospheric solid phase D: Vacuum solid phase

药物说明书撰写通常是在药物临床试验哪一期完成后？（） A: Phase 1 B: Phase 2 C: Phase 3 D: Phase 4