阿奇舒勒认为技术系统矛盾冲突不包括（）。 ["管理冲突","关系冲突","技术冲突","物理冲突"]
产前诊断的定义是什么？
When a vessel is aground,（）. ["she is underway","she is not underway","whether she is underway cannot be determined","she might be or not be underway"]
根据TRIZ理论，发明的第三等级是（）。 ["合理化建议","适度新型革新","综合性重要专利","专利"]
When did you check the contents of C02 cylinders（）. ["by counting","by calculating","by weighing","by filling"]
各部软化点的不同，煤沥青一般可分为哪几种？
