设有支撑的基坑，应遵循“开槽支撑，先撑后挖、分层开挖和严禁超挖”的原则开挖。
参考答案：对
癫痫大发作时，首要处理是（）。
A.吸氧
B.保持呼吸道通畅
C.防止骨折
D.保暖
E.控制抽搐
Could you tell me _____________ ?
A．what she had done with the newspaper
B．what the matter is with him
C．which is the way to the nearest hospital
D．which gate I should go
