手动切除交流滤波器时应遵循什么原则？（）
A.先投后切
B.先切后投
C.随机
D.由其他因素决定
参考答案：A
My friend has _____ hair than me, and he's _____ than me. [ ]
A. long, outgoing
B. more longer, more outgoing
C. longer, more outgoing
D. longer, outgoing
空冷器的翅片管有哪几种形式？
