What is the primary benefit of Single Number Reach？（）A、 Employees can receive calls at their desk and cell phone simultaneously.B、 Customers can call one number to reach all employees.C、 Employees can have their calls forwarded to the receptionist.D、 Cust

A. Every 16 - bit segment segment that consists of all zeroes can be represented with a single colon.

B. The trailing zeroes in any 16 - bit segment do not have to be written.

C. The leading zeroes in any 16 - bit segment do not have to be written.

D. Any single, continuous string of one or more 16 - bit segments that consists of all zeroes can be represented with a double colon.

E. The maximum number of times a double colon can replace a 16 - bit segment that consists of all zeroes is two.

F. Two zeroes in the middle of any 16 -bit segment do not have to be written.

You need to produce a report for mailing labels for all customers. The mailing label must have only the customer name and address. The CUSTOMERS table has these columns:CUST_ID NUMBER(4) NOT NULLCUST_NAME VARCHAR2(100) NOT NULLCUST_ADDRESS VARCHAR2(150)CUST_PHONE VARCHAR2(20)Which SELECT statement accomplishes this task?（）

A. SELECT* FROM customers;

B. SELECT name, address FROM customers;

C. SELECT id, name, address, phone FROM customers;

D. SELECT cust_name, cust_address FROM customers;

E. SELECT cust_id, cust_name, cust_address, cust_phone FROM customers;

Passage Two

Telephone books in the United States have white, blue and yellow pages. The white pages list people with phones by last name, the blue pages contain numbers of city services, government agencies and public schools. Businesses and professional (专业的) services are listed in a special section, the yellow pages. To make a long-distance call, you need an area code. Each area in the U. S. has an area code. The area covered by one area code may be small or large. For example, New York City has one area code, but so does the whole state of Oregon. If you want to know the area code of a place, you can look it up in the area code map, which is printed in the front of the white pages.

There are a lot of publlic telephones in the US. They have their own numbers. If you are making a long-distance call on a pubic telephone and run out of money, give the number on you phone to the person you are talking to, then hang up the receiver, and he can call you back. If you make a long-distance call and get a wrong number, call the operator and explain what happened. This means that you can make the call again to the right number without having to pay more money.

36. Where can you find the telephone number of a city council (市议会) in the telephone book?

A. In the blue pages.

B. In the white pages.

C. In the yellow pages.

D. In a special section.

You added a PHONE_NUMBER column of NUMBER data type to an existing EMPLOYEES table. The EMPLOYEES table already contains records of 100 employees. Now, you want to enter the phone numbers of each of the 100 employees into the table. Some of the employees may not have a phone number available. Which data manipulation operation do you perform? （）

A. MERGE

B. INSERT

C. UPDATE

D. ADD

E. ENTER

F. You cannot enter the phone numbers for the existing employee records.