6502电气集中电路中，XJJ网络检查了哪些联锁条件电路是如何实现的？
The bottom of the mast rests on a part of the keel called the mast（）. ["foot","heel","step","sole"]
（）业务开户需要提交端到端申请。 ["车务通","企业信使","MAS","农政通"]
假设某公司每年分配股利1.2元，最低收益率15%，则该股票的内在价值为（） ["10元","9元","8元","7元"]
The boom stops are installed on an offshore crane to（）. ["prevent the boom from being raised too high","prevent the boom from swinging","support the boom when not in use","prevent the boom from being lowered"]
简述煤气低压的故障处理？
