海船船员考试

单选题Weather information is available from（）.A Commercial radio broadcastsB The Coast Guard on scheduled marine information broadcastsC VHF-FM continuous marine weather broadcasts provided by the National Weather ServiceD All of the above

题目
单选题
Weather information is available from（）.
A

Commercial radio broadcasts

B

The Coast Guard on scheduled marine information broadcasts

C

VHF-FM continuous marine weather broadcasts provided by the National Weather Service

D

All of the above

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相似问题和答案

第1题：

要查询INFORMATION表中姓“王”且日￡名的学生情况。可以用下列哪个命令?…

A．SELECT*FROM INFORMATION WHERE姓名=‘王--’

B．SELECT*FROM INFORMATION WHERE姓名LIKE‘王％’

C．SELECT*FROM INFORMATION WHERE姓名=‘王％’

D．SELECT*FROM INFORMATION WHERE姓名LIKE‘王_’


正确答案：D
解析：LIKE运算符的一般形式为：列名[NOT]LIKE<匹配串>。匹配串中可包含四种通配符：一(下划线)、％(百分号)、[]和[^]。

第2题：

Using the LIST command in Recovery Manager (RMAN), which two pieces of information in the RMANrepository can be listed?()

A. stored scripts in the recovery catalog

B. backups that can be deleted from disk

C. backup sets and image copies are obsolete

D. backups that do not have the AVAILABLE status in the RMAN repository RMAN


参考答案：A, D

第3题：

要查询Information表中学生姓中含有“张”的学生情况，可以用下列哪个命令?——

A．SELECT* FROM Information WHERE s—Flame=‘张’

B．SELECT*FROM Information WI-IERE s—name LIKE‘张％’

C．SELECI*FROM Information WHERE s．_name LIKE‘张一’

D．SEt,ECT*FROM Information WHERE s—name LIKE‘％张％’


正确答案：D
解析：查询information表中学生姓中含有“张”的学生情况的SQL语句是：SELECT*FROM InformationWHERE s—name LIKE‘％张％’。LIKE运算符的一般形式为：列名[N0T]JKE<匹配串>。匹配串中可包含四种通配符：_(下划线)、％(百分号)、[]、[^]。

第4题：

If you are sailing from the East Coast of the United States to the Caribbean Sea，which publication would contain information on weather，currents，and storms?

A.Sailing Charts of the Caribbean Sea

B.Pilot Charts of the North Atlantic

C.Light Lists，Atlantic and Gulf Coast

D.Tidal Current Tables


正确答案：B

第5题：

The Internet is an open system, and most information is available to everyone．It is very important to add ______ to existing system for protecting the secret information.

A．Web pages

B．modem

C．security

D．network


正确答案：C
解析：译文的含义是：因特网是开放式系统，多数信息对每个人都可用。为了保护秘密信息，对现有的系统增加()是非常重要的。选项A～D的含义分别是网页、调制解调器、安全性和网络。

第6题：

Using the LIST command in Recovery Manager (RMAN), which two pieces of information from the RMAN repository can be listed?()

A. Stored scripts in the recovery catalog

B. Backups that can be deleted from disk

C. Backup sets and images copies that are obsolete

D. Backups that do not have the AVAILABLE status in the RMAN repository


参考答案：A, D

第7题：

The Internet is an open system，and most information is available to everyone．It is very important to add(74)to existing system for protecting the secret information．

A．Web pages

B．modem

C．security

D．network


正确答案：C

第8题：

关于group by 以下语句正确的是( )

A.SELECT store_name FROM Store_Information GROUP BY store_name

B. SELECT SUM(sales) FROM Store_Information GROUP BY sales

C.SELECT store_name, price SUM(sales) FROM Store_Information GROUP BY store_name，price

D.SELECT store_name, SUM(sales) FROM Store_Information GROUP BY store_name


正确答案：D,C,B 

第9题：

The weather in South China is d_________ from that in North China.


正确答案：
 different

第10题：

Weather information is available from ______．

A.Commercial radio broadcasts

B.The Coast Guard on scheduled marine information broadcasts

C.VHF-FM continuous marine weather broadcasts provided by the National Weather Service

D.All of the above


正确答案：D

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