椭圆形罐特别适用于( )。
A.汽油的储存
B.天然气的储存
C.液氮的储存
D.城市煤气的储存
参考答案:A,B
情景交际。
A: What are you doing for vacation?
B: I'm going to San Francisco.
A: 1. _______. Who are you going 2. _______ ?
B: I'm going with my family.
A: 3. _______?
B: I'm going on the llth.
A:4_______
B: l'm staying there for a week.
A: How are you getting there?
B: I'm 5. _______a plane.
A: I wish you a good trip.
B: Thank you.
电流互感器进行短路匝补偿后.可增大相位差,减小比值差。