水在流动时的水头损失可分为（）水头损失和（）水头损失。
参考答案：沿程、局部
发电机定子绕组采用水内冷，运行中最容易发生漏水的地方是：绝缘引水管的（）部分和绕组的（）部分。
Which of the following is NOT a characteristic of perfect competition（）
A. The products produced within a given market are homogenous.
B. The demand curve for an individual firm is a vertical line.
C. The size of each firm is small relative to the size of the overall market.
