单选题Yuri created a formula for a button. The code is supposed to set the value of an existing field called title. He used the following formula: title:= @propercase (title); after the foumula runs ,the title field is null. Why? （）A the value of one field c

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单选题

Yuri created a formula for a button. The code is supposed to set the value of an existing field called title. He used the following formula: title:= @propercase (title); after the foumula runs ,the title field is null. Why? （）

the value of one field cannot be set from the value in another field

the text string in the formula is set to null. Thus notes cannot validate the formula

when setting the value of a field , the formula must be in the field‟s input validation event

the formula does not specify that title is an existing field. Thus it is interpreted as a temporary variable

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正确答案： C

解析：暂无解析

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单选题Yuri created a formula for a button. The code is supposed to set the value of an existing field called title. He used the following formula: title:= @propercase (title); after the foumula runs ,the title field is null. Why? （）A the value of one field c

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