【单选题】Tom wants to study at _______ university in Europe, but hasn't decided which one to go to yet.
【单选题】设有学生信息关系STUDENT(sno, sname, sex, age, dept)。“查找信息系(IS系)中年龄小于20岁的学生的姓名”,该操作正确的关系代数表达式是______。 Ⅰ.πsname(σdept='IS'∧age<20(STUDENT)) Ⅱ.σdept='IS'∧age<20(πsname(STUDENT)) Ⅲ.σsname(πdept='IS'∧age<20(STUDEN...
【简答题】根据课文内容填空。 Wang Bing is 1._____ an 2._____ to his 3._____ friend, Tom. Gao San wants to 4._____ table tennis 5._____Wang Bing. But Wang Bing is 6._____ now. Who is Tom? Tom is an 7._____ boy. He 8.____...
【简答题】Break, break, break, On thy cold grey stones, O Sea! And I would that my tongue could utter The thoughts that arise in me. O well for the fisherman's boy, That he shouts with his sister at play! O wel...
【多选题】下列关于单位通知存款通知手续的描述,正确的是()。
A.
单位通知存款支取前,应按照存款品种约定的通知期限通知银行。
B.
单位通知支取须采用书面方式通知银行支取的金额和时间。
C.
单位在通知期限内取消通知的须采用书面方式通知银行。
D.
通知期内可以撤销并重新通知,已过通知期的不可办理撤销。
【单选题】Tom wants to study at ______university in Europe, but hasn’t decided which one
【单选题】( 32 ) 设有学生信息关系 STUDENT ( sno , sname , sex , age , dept ) 。 “ 查找信息系 ( IS 系 ) 中年龄小 于20 岁的学生的姓名 ” ,该操作正确的关系代数表达式是 Ⅰ . π sname ( σ dept= ’ IS ’ ∧ age<20( STUDENT )) Ⅱ . σ dept=’ IS ’ ∧ age<20 ( π sname...