which one of the following types of actions can be used on unopened doc?（）

johnhascreatedadatabaselibrary,librariansareresponsible...

单项选择题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?（）

lisaiswritingaformulatodeterminethenumberofelementsinal...

单项选择题lisa is writing a formula to determine the number of elements in a list. she wants to ensure that a value is returned, even if the value her function is evaluating turns out to be a null string . which one of the following can she so to accomplish this ?（）

whenrobertcreatedaresponseform.hesetthe"formulasinherit...

单项选择题when robert created a response form. he set the "formulas inherit values from selected document" option on the form properties, the field name on the review form is the same as the field name on the inheriting form, however the form does not inherit any data ,why ?（）