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【单选题】
要建立一个约束，保证用户表（user）中的年龄（age）必须在16岁以上，下面语句正确的是（ ）A.
Alter table user add check(age>16)
B.
Alter table user add default 16 for age
C.
Alter table user add unique(age>16)
D.
Alter table user add default 16
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举一反三
【单选题】An action that is lavishly rewarded as soon as it is performed is well on its way to becoming a habit.
A.
promptly
B.
generously
C.
evidently
D.
sympathetically
【判断题】A mistake is less 'serious' than an error since it is the retrieval that is faulty not the knowledge.()
A.
正确
B.
错误
【简答题】IC卡按卡中所镶嵌的集成电路芯片可分为 两大类().A. 存储器卡和 CPU卡 B. 存储器卡和接 触式IC卡 C. CPU卡和非接 触式IC卡 D. 接触式IC卡和非接触 式IC卡
【判断题】An argument that is spoken is no good if it is not spoken loudly enough.()
A.
正确
B.
错误
【简答题】An ‘interlanguage' is a language that is in the process of developing. ( )
【单选题】An action that is lavishly rewarded as soon as it is performed is well on its way to becoming a habit.
A.
promptly
B.
abruptly
C.
evidently
D.
generously
【单选题】An epigram is usually defined being a bright or witty thought that is tersely and ingeniously expressed.
A.
as
B.
as be
C.
as been
D.
to being
【单选题】An 'epigram' is usually descried as a bright or witty thought that is tersely and ingeniously expressed.
A.
described
B.
discarded
C.
deserved
D.
disconcerted
【简答题】IC卡按卡中所镶嵌的集成电路芯片可分为两大类().A. A:存储器卡和 CPU卡 B. B:存储器卡和接触式IC卡 C. C:CPU卡和非接触式IC卡 D. D:接触式IC卡和非接触式IC卡
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