变压器在投运前做冲击试验是为了检验重瓦斯保护是否可靠。
参考答案：错
The pilot asked all the passengers on board to remain ______ as the plane was making a landing.
A．seat
B．seating
C．seated
D．to be seating
财务（）首先体现在项目有足够的经营活动净现金流量。
A．生存能力
B．偿债能力
C．还本付息
D．可持续性
