For on-site inspections(OSI) under the CTBTO,measurement of the noble gas Argon-37 was considered an important technique,as ~(37)Ar is a definitive and unambiguous indicator of a nuclear underground explosion.

Combined with project example,it introduces on-site exploration condition after fire hazard,and discusses the detection methods of the burn deepness of burning structural member,which will supply basis for the strengthening of reinforced concrete structure.

For any project that is managed by bidding,the spot examination before its construction is an indispensable work for the bidding enterprise.

This research has assessed the scientific inquiry abilities of 178 students from grade three in junior high schools using pencil-and-paper test,worksheet and spot observation in order to study the fairness of different assessment methods for different groups of students.

This research assesses scientific inquiry abilities of 178 students from grade three in junior high schools by using spot observation and worksheet in order to study the alternation of worksheet with spot observation,namely worksheet s validity for the assessment of scientific inquiry abilities.