【多选题】【消耗次数：1】
He has____________________ problems.
①
some
②
plenty of
③
lots of
④
a lot of
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相关题目
【单选题】
Her parents objected to ____ that farmer, though he has a lot of money.?
①
her marrying ?
②
marrying ?
③
marry ?
④
her marrying with?
【单选题】
He always has a lot of _______ ideas in his mind , and sometimes we do not even know what he is thinking about.
①
novel
②
spoil
③
acceptable
④
additional
【单选题】
—We all had a lot of fun at the barbecue ?yesterday. Pity you weren’t there.
—I really should have gone with ?you but I _______ on some remaining problems.
①
worked
②
was working?
③
would work
④
would have worked
【单选题】
America has a lot of _______ weapons now.
①
aggressive
②
expensive
③
passive
④
expressive
【单选题】
He argued that it is the youths duty to find the problems in the society [] solve the problems in the society.
①
or
②
and
③
but
④
so
【单选题】
The furniture has broken for some days, and it _______ .
①
needs fixed
②
needs fixing
③
needs to fix
随机题目
【单选题】
检索选修四门以上课程的学生总成绩，并要求按总成绩的降序排列出来。正确的SELECT语句是（ ）。
①
A.SELECTSNO, SUM (GRADE) FROM SC GROUP BYSNO ORDER BY2 DESC HAVING COUNT(*)
②
B.SELECTSNO, SUM (GRADE) FROM SC GROUP BYSNO HAVING COUNT(*)=4 ORDER BY2 DESC;
③
C.SELECTSNO, SUM (GRADE) FROM SC HAVING COUNT(*)=4 GROUP BYSNO ORDER BY2 DESC;
④
D.SELECTSNO, SUM (GRADE) FROM SC ORDER BY2 DESC GROUP BYSNO HAVING COUNT(*)
【单选题】
若关系R和S分别有r和s个属性，分别含有m和n个元组，则R×S（ ）
①
A.包含r+s个属性和m+n个元组
②
B.包含r+s个属性和m×n个元组
③
C.包含r×s个属性和m+n个元组
④
D.包含r×s个属性和m×n个元组
【单选题】
学生关系模式 S (SNO，SNAME，SEX，AGE），S的属性分别表示学生的学号、姓名、性别、年龄。要在表S中删除属性“AGE”，可选用的SQL语句是（ ）。
①
A.DELETE AGE FROM S
②
B.ALTER TABLE S DROP AGE
③
C.UPDATE S AGE
④
D.ALTER TABLE S AGE
【单选题】
数据库系统中，物理数据独立性是指（ ）。
①
A.数据库与数据库管理系统的相互独立
②
B.应用程序与DBMS的相互独立
③
C.应用程序与存储在磁盘上数据库的物理模式是相互独立的
④
D.应用程序与数据库中数据的逻辑结构相互独立
【单选题】
在SQL语言中，用于测试列值非空的短语是（ ）
①
A.IS NOT EMPTY
②
B.NOT UNIQUE
③
C.IS NOT NULL
④
D.NOT EXISTS