几台变压器并列运行时,接线组别不相同,会有()产生,将使变压器()。
参考答案:循环电流;烧毁
Grandma often tells us stories after meals, but they are quite____.
A.interesting
B.excited
C.funny
D.boring
200km/h≤容许速度≤250km/h的线路,工作边肥边大于()mm时需要及时整治。
A.0.2
B.0.3
C.0.5
D.1