题目内容

MyfatherwaswatchingTV______mymotherwascooking.

A. when
B. until
C. while
D. assoonas

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Lindaspendsalotofmoneyonclothes_______herfamilyisnotrich.

A. because
B. though
C. if
D. so

Why not buy a cheaper one, _____________you don’t have enough money?

A. since
B. because
C. for
D. though

__________the rain has stopped, let’s continue to work.

A. For
B. Now that
C. That
D. Because

请用SQL语句创建Emp和Dept表，Emp(Eno, Ename, Eage, Salary, Deptno)Dept(Deptno, Dname, Phone, Loc)并存在以下约束。(1) Dept的主键是Deptno,Emp的主键是Eno。(2) Emp的外键是Deptno，被参考的关系是Dept。(3) Emp的 Eage取值在20~60之间，默认值为30。(4) Dept的Dname值唯一且非空。(5) Emp的Salary要求必须大于1000。