john has created a database library, librarians are responsible for adding new information to the db library. which one of the following minimum level of access he can grant the librarians of the db library?（）

单项选择题lisaiswritingaformulatodeterminethenumberofelementsinalist.shewantstoensurethatavalueisreturned,evenifthevalueherfunctionisevaluatingturnsouttobeanullstring.whichoneofthefollowingcanshesotoaccomplishthis?（）

A.use a defaule formula of 1 
B.use @elements and add 1 to the total 
C.use the @count function instead of @elements 
D.use @texttotime to ensure that all strings arte converted to date-time values 

单项选择题whenrobertcreatedaresponseform.hesetthe formulasinheritvaluesfromselecteddocument optionontheformproperties,thefieldnameonthereviewformisthesameasthefieldnameontheinheritingform,howevertheformdoesnotinheritanydata,why?（）

A.he failed to specify the form type  
B.the inheriting form is not a response form  
C.he specified the same field names on both forms 
D.he failed to provide inheritance formulas for each field