题型:选择题 Liu Xiang can't attend the Political Consultative Conferences ____ in Beijing due to training. [ ]A. to hold B. held C. to be held D. being held 查看答案
题型:单项选择题 关于字段默认值叙述错误的是( )。A.设置文本型默认值时不用输入引导,系统自动加入B.设置默认值时,必须与字段中所设的数据类型相匹配C.设置默认值可以减少用户输入强度D.默认值是一个确定的值,不能用表达式 查看答案