取得认可的机构的（）设施、自行制定的认证规则等与认可条件相关的情况发生变化的，应当及时告知认可机构。 ["主要负责人","从业人员","部门负责人","专家"]
（）, we kept removing the pistons. ["Late as it was","As it was late","Since it was late","Because of its late"]
根据各年的季度资料计算的季节指数之和等于（）。 ["100%","120%","400%","1200%"]
什么是焊接热影响区？低碳钢焊接时热影响区分为哪些区段？
系统具备自动处理差错功能，下列哪些业务产生差错时，系统是在对账时可以自动处理的（）。 ["电子汇兑来账","人账户通存来账","汇票结清","电子渠道的电子汇兑往账"]
简述中国古代科技的总体特征。
