You need to change the definition of an existing table. The COMMERCIALS table needs its DESCRIPTION column changed to hold varying length characters up to 2000 bytes. The column can currently hold 1000 bytes per value. The table contains 20000 rows. Which

题目

You need to change the definition of an existing table. The COMMERCIALS table needs its DESCRIPTION column changed to hold varying length characters up to 2000 bytes. The column can currently hold 1000 bytes per value. The table contains 20000 rows. Which statement is valid?（）

A、ALTER TABLE commercials MODIFY (description CHAR2(2000));
B、ALTER TABLE commercials CHANGE (description CHAR2(2000));
C、ALTER TABLE commercials CHANGE (description VARCHAR2 (2000));
D、ALTER TABLE commercials MODIFY (description VARCHAR2 (2000));
E、You cannot increase the size of a column if the table has rows.

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相似问题和答案

第1题：

You create a Web application. The Web application enables users to change fields in their personal profiles. Some of the changes are not persisting in the database. You need to raise a custom event to track each change that is made to a user profile so that you can locate the error.Which event should you use? （）

A. WebAuditEvent

B. WebEventManager

C. WebBaseEvent

D. WebRequestEvent

参考答案：C

第2题：

Exhibit: You are developing a Web application. The Web application uses a GridView control to display data. You build your Web Forms for the Web application by dragging and dropping tables from the Data Connections tree in Server Explorer. You need to add a connection to your data by using the Add Connection dialog box as shown in the exhibit. During the process, you need to configure the .NET Data Provider that you use to create the data source objects. What should you do?（）

A. Right-click the connection, and click Properties. Modify the Provider property of the data connection.

B. Click the Change button, and change the data provider for the selected data source.

C. Click the Advanced button, and change the Data Source property to the target provider.

D. Click the Advanced button, and change the Application Name property to the target provider.

参考答案：B

第3题：

DREAMS AND GOALS Are you waiting for your dreams to come true and change your life I'm sorry to tell you that dreams won't come true. It's your goals(1)can forever change your life. You need to(2) goals in order to turn your dreams into reality. Don't get confused by dreams and goals. Dreams are easy. They are free, too. (3), dreams are imaginary. And they don't produce tangible results. You need to turn your dreams(4) action. You need goals to make the(5) of your dreams real. Dreams can inspire you, but goals can change your life. Goals are all about action. Goals change you and then change your life.

1.A. that

B. this

C. why

2.A. plan

B. set

C. have

3.A. But

B. Although

C. However

4.A. up

B. into

C. on

5.A. visions

B. decision

C. illusion

参考答案：1：A; 2：B; 3：C; 4：B; 5：A

第4题：

资料：Changing careers is becoming more popular. Not just because there are more career options available, but also out of necessity. As new industries arise, others die. It's up to you to figure out if your career is still going to be around in the next 5-10 years. Some studies say we could have as many as nine careers in our professional lifetime. Which begs the question: do you know what it takes to successfully change career lanes repeatedly?
Switching careers is like changing highway lanes: you must signal!
If you want to move in a new career direction, you need to signal to the professional world you intend to make a change. You need to do it with purpose and specificity. It must look well-thought out and intentional. Otherwise, people will A） not know you are looking to make the change, and B）assume you are doing it because you failed in your current career in some way.
1. Give the logic and passion behind your career change.
When signaling to your network you want to switch careers you must explain why both your head and heart are ready to change. Perhaps there are financial or geographic reasons （i.e., you need to relocate or make more money）. But, you must also convey the excitement and sincere desire you have for this new career （i.e., you want to make a difference or work on a particular type of problem that needs to be solved）.
2. Build a marketing campaign for your business-of-one.
Most employers prefer to hire people with previous experience. Thus, you're going to need a way to convey to them your transferable skills from your former career path will be equally valuable. The best way to do this is to create a targeted list of employers you want to work for and then strategically network with their employees. The more conversations and connections you can have within your new career path, the easier it will be to convince someone to hire you in spite of your lack of experience.
To sum it up … Once you commit to a career change, the secret to success is to make sure everyone knows about it. Otherwise, you will struggle to change career lanes efficiently and effectively.

What does the sentence “you must signal!” mean in paragraph 2?

A.You need to have more conversations and connections within your new career path.
B.You need to build a marketing campaign for your business-of-one.
C.You need to give the logic and passion behind your career change.
D.You need to make sure everyone knows about it.

答案：D

解析：

本题考查的是词义判断。
【关键词】”you must signal’;mean;in paragraph 2
【主题句】第2自然段 Switching careers is like changing highway lanes: you must signal! If you want to move in a new career direction, you need to signal to the professional world you intend to make a change.转行就像变换高速公路车道，你必须发出信号。如果你想进入新的职业方向，你需要向职业世界表明你打算做出改变。
【解析】题干意为“第2自然段的‘you must signal!’是什么意思？” 选项A意为“在新的职业道路上，你需要有更多的对话和联系”；选项B意为“您需要为您的企业创建营销活动”；选项C意为“在职业变化背后，你需要逻辑和激情”；选项D意为“你需要确保每个人都知道”；根据主题句可知，转行需要提前让别人知道你要转行，故选项D正确。

第5题：

Certkiller .com has asked you to create a file management application to monitor the hosts file.Certkiller .com has instructed you to change the hosts file if it has been changed.You, therefore, need to display the size and whether the hosts file is set to read-only.What should you do?（）

参考答案：A

第6题：

You create a master page named PageBase.master. The master page contains a Label control named lblTitle.You create a content page that references the master page.You need to change the Text property of the master page‘s lblTitle control from the content page.Which code segment should you use?（）

参考答案：A

第7题：

All client computers on your company network run Windows 7. A computer is unable to connect to network resources. The configuration of the computer is as shown in the following table.You need to ensure that the computer is able to connect to network resources. What should you do?（）

A.Change the IP address to 131.107.3.254.

B.Change the subnet mask to 255.255.248.0.

C.Change the default gateway to 131.107.0.1.

D.Change the preferred DNS server to 131.107.3.1.

参考答案：C

第8题：

－ ()－ Besides Bank of China, you can get the money exchanged in Industrial and Commercial Bank of China, China Construction Bank etc..

A、Could you tell me whether I need to fill in the exchange memo

B、Could you tell me whether I can change foreign currency in other banks

C、Could you tell me whether you can accept traveler’s checks

参考答案：B

第9题：

资料：Changing careers is becoming more popular. Not just because there are more career options available, but also out of necessity. As new industries arise, others die. It's up to you to figure out if your career is still going to be around in the next 5-10 years. Some studies say we could have as many as nine careers in our professional lifetime. Which begs the question: do you know what it takes to successfully change career lanes repeatedly?
Switching careers is like changing highway lanes: you must signal!
If you want to move in a new career direction, you need to signal to the professional world you intend to make a change. You need to do it with purpose and specificity. It must look well-thought out and intentional. Otherwise, people will A） not know you are looking to make the change, and B）assume you are doing it because you failed in your current career in some way.
1. Give the logic and passion behind your career change.
When signaling to your network you want to switch careers you must explain why both your head and heart are ready to change. Perhaps there are financial or geographic reasons （i.e., you need to relocate or make more money）. But, you must also convey the excitement and sincere desire you have for this new career （i.e., you want to make a difference or work on a particular type of problem that needs to be solved）.
2. Build a marketing campaign for your business-of-one.
Most employers prefer to hire people with previous experience. Thus, you're going to need a way to convey to them your transferable skills from your former career path will be equally valuable. The best way to do this is to create a targeted list of employers you want to work for and then strategically network with their employees. The more conversations and connections you can have within your new career path, the easier it will be to convince someone to hire you in spite of your lack of experience.
To sum it up … Once you commit to a career change, the secret to success is to make sure everyone knows about it. Otherwise, you will struggle to change career lanes efficiently and effectively.

What’s the best way to convince someone to hire you in spite of your lack of experience?

A.To build a marketing campaign by creating a better resume.
B.To give the logic and passion behind your career change.
C.To make sure everyone knows about your intention of changing career.
D.To have more conversations and connections within your new career path.

答案：D

解析：

本题考查的是细节理解。
【关键词】the best way; to convince someone to hire you; in spite of your lack of experience
【主题句】第5自然段 The more conversations and connections you can have within your new career path, the easier it will be to convince someone to hire you in spite of your lack of experience. 在新的职业道路上，你有越多的对话和联系，就越容易说服别人雇用你，即便你缺乏工作经验。
【解析】题干意为“说服别人雇用你而不顾你缺乏工作经验的最佳方式是什么？” 选项A意为“通过创建更好的简历来建立营销活动”；选项B意为“在职业变化背后，你需要逻辑和激情”；选项C意为“确保每个人都知道你改变职业的意愿”；选项D意为“在新的职业道路上有更多的对话和联系”。根据主题句可知，选项D符合题意。

第10题：

A.As new industries arise, the popularity of different careers also change.
B.Nowadays people don’t know what they really want to do.
C.Because changing careers is becoming more popular.
D.Because one could have as many as nine careers in his professional lifetime.

答案：A

解析：

本题考查的是细节理解。
【关键词】why;changing career; becoming a necessity
【主题句】第1自然段 Changing careers is becoming more popular. Not just because there
are more career options available, but also out of necessity. As new industries arise, others die. It's up to you to figure out if your career is still going to be around in the next 5-10 years. 改变职业正变得越来越流行，这不仅仅是因为有更多的职业可供选择，而且也是需要使然。随着新行业的兴起，其他一些行业消失。你应该弄明白你的职业在未来5-10年内是否仍然存在。
【解析】题干意为是“为什么改变职业成为需要？”选项A意为“随着新兴产业的兴起，不同职业的流行度也随之改变”；选项B意为“如今人们不知道他们真正想做什么”；选项C意为“因为改变职业越来越受欢迎”；选项D意为“因为一个人在职业生涯中可以有多达九个职业”。根据主题句可知，新产业兴起，提供更多的选择可能，故选项A正确。

You need to change the definitio

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