对电力变压器，应装设相应的保护装置的情况有（）。
A.绕组的匝间短路
B.电压降低
C.冷却系统故障
D.变压器温度升高
参考答案：A, C, D
The new bridge over the Jinsha River last year, which makes it very easy to go to the city center.[ ]
A. built
B. was built
C. has built
D. has been built
水温表显示在90℃表示（）
A.冷却液温度刚好为90℃
B.水温在75℃到105℃之间
C.温度表不准确
D.此时水温处于警告区
