旅行社投保“旅行社责任保险”，必须在境内经营责任保险的保险公司投保。 ( )
参考答案：对
It’s ________ Steve is often late for work with the same excuse ________ annoies his boss.
A．what, that
B．that, what
C．that, that
D．which, that
烟管与引风机连接时应采用软件接头，不得将烟管重量压在风机上。( )
