Which syntax turns an existing constraint on?（）A、ALTER TABLE table_name ENABLE constraint_name;B、ALTER TABLE table_name STATUS = ENABLE CONSTRAINT constraint _ name;C、ALTER TABLE table_name ENABLE CONSTRAINT constraint _ name;D、ALTER TABLE table_name TURN

题目

Which syntax turns an existing constraint on?（）

A、ALTER TABLE table_name ENABLE constraint_name;
B、ALTER TABLE table_name STATUS = ENABLE CONSTRAINT constraint _ name;
C、ALTER TABLE table_name ENABLE CONSTRAINT constraint _ name;
D、ALTER TABLE table_name TURN ON CONSTRAINT constraint _ name;

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相似问题和答案

第1题：

The man page for command shows the following syntax: The man page for command shows the following syntax: command [ －a | －b ] Which of the following statements is true regarding this entry?()

A. Either the -a or flag -b may be used, but not both.

B. If the flag -a is used then the flag -b also must be used.

C. One of the -a or -b flags must be used, but not both at the same time.

D. Both the flags may be used together, but neither are mandatory.

参考答案：D

第2题：

Which of the following is most suitable for the cultivation of linguistic competence?

A．Sentence-making.
B．Cue-card dialogue.
C．Simulated dialogue.
D．Learning syntax.

答案：A

解析：

考查培养语言能力的手段。在四个选项中，“造句”是最适合培养语言能力的手段。

第3题：

Of the existing theories about the origin of carnival ，people are not sure which theory is more true to the fact.()

正确答案：对

第4题：

Which syntax turns an existing constraint on?（）

A、ALTER TABLE table_name ENABLE constraint_name;
B、ALTER TABLE table_name STATUS = ENABLE CONSTRAINT constraint_name;
C、ALTER TABLE table_name ENABLE CONSTRAINT constraint_name;
D、ALTER TABLE table_name STATUS ENABLE CONSTRAINT constraint_name;
E、ALTER TABLE table_name TURN ON CONSTRAINT constraint_name;

正确答案:C

第5题：

The factory（）, bicycles a month.

A、turns into
B、turns up
C、turns in
D、turns out

正确答案:D

第6题：

Stressful environments lead to unhealthy behaviors such as poor eating habits, which ________ increase the risk of heart disease.

[A] in turn

[B] in return

[C] by chance

[D] by turns

正确答案：A

第7题：

Which one of the following studies the internal structure of words， and the rules by which words are ( ) formed？

A.Morphology
B.Syntax
C.Phonology
D.Semantics

答案：A

解析：

考查语言学知识。题干为：以下哪一项研究单词的内部结构，以及单词形成的规则？A项Morphology(形态学)研究词的内部结构和构词规则。B项Syntax(句法学)主要研究语言的句子结构。C项Phonology(音系学)研究语音的产生、传播、接受过程，考查人类语言中的声音。D项Semantics(语义学)不仅关心字词作为词汇的意义，还有语言中词之上和之下的意义。

第8题：

Which syntax turns an existing constraint on? ()

A. ALTER TABLE table_name ENABLE constraint_name;

B. ALTER TABLE table_name STATUS = ENABLE CONSTRAINT constraint _ name;

C. ALTER TABLE table_name ENABLE CONSTRAINT constraint _ name;

D. ALTER TABLE table_name TURN ON CONSTRAINT constraint _ name;

参考答案：C

第9题：

Which Public Key Cryptographic Standards （PKCS） defines the syntax for encrypted messages andmessages with digital signatures？（）

A、PKCS #7
B、PKCS #8
C、PKCS #10
D、PKCS #12

正确答案:A

第10题：

What are three objectives that the no ip inspect command achieves？（）

A、removes the entire CBAC configuration
B、removes all associated static ACLs
C、turns off the automatic audit feature in SDM
D、denies HTTP and Java applets to the inside interface but permits this traffic to the DMZ
E、resets all global timeouts and thresholds to the defaults
F、deletes all existing sessions

正确答案:A,E,F

Which syntax turns an existing c

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