假设已在Access中建立了包含“书名”、“单价”和“数量”等三个字段的“tOfg”表,以该表为数据源创建的窗体中,有一个计算订购总金额的文本框,其控件来源为__________。
A. [单价]*[数量]
B. =[单价]*[数量]
C. [图书订单表]![单价]*[图书订单表]! [数量]
D. =[图书订单表]![单价]*[图书订单表]! [数量]
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幽门梗阻可发生哪项代谢改变
A. 呼吸性碱中毒
B. 呼吸性酸中毒
C. 代谢性碱中毒
D. 代谢性酸中毒
E. 代氯高钾碱中毒
An investor purchases an office building for $2500000. He puts 10 percent down and finances the remainder at a 9 percent rate of interest. Calculate the first year's after-tax cash flow for the investment using the following information
A. NOI
B. $ 243000
C. Depreciation
D. $ 25000
E. Annual mortgage payment
F. $ 218000
G. Marginal income tax rate
H. 28%
-- Your father was angry ______ your sister just now, wasn't he-- Yes, because he was not pleased ______ her homework.
A. with; with
B. for; to
C. about; for
下面说法中,错误的是__________。
A. 文本型字段,最长为255个字符
B. 要得到一个计算字段的结果,仅能运用总计查询来完成
C. 在创建一对一关系时,要求两个表的相关字段都是主关键字
D. 创建表之间的关系时,正确的操作是关闭所有打开的表