SQL语言具有____的功能。
B
暂无解析
Hefellasleepimmediatelylastnight;hemust________(be)verytired.
设，则数列sn有界是数列an收敛的（）
Howlong________they________(dig)theditch?
f(x)在[0,2]上具有连续导数,
________tothepapersisrestrictedtoDefenseDepartmentpersonnelonly.
