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  3. MEMORANDUMTo: All staffFrom: Brian Candler (B.Cand

MEMORANDUMTo: All staffFrom: Brian Candler (B.Cand

游客2025-06-18  15
问题                             MEMORANDUM
To: All staff
From: Brian Candler (B.Candler@pobox.com)
Delivery date: Mon, 28 May 2007,13:47:03
Subject: Long-distance calling instructions
Next month, there will be an important change to the way we make long-distance telephone calls. This should help provide extra security for our telephone systems. Your authorization number will go from four digits to five digits in length. A "3" will be added to the start of your authorization number. For example, if your number was "1234" , it will change to "31234" . Remember that if you have automatic telephones or fax machines, they will have to be reprogrammed.
The authorization number is not necessary when making-local calls. [br] Why is the change outlined in this memo made?
选项 A、To reduce costs
B、To adapt to a new phone system
C、To increase the security of the communication system
D、To provide automatic dialing
答案 C
解析 原文开头提到：This should help provide extra security for our telephone system．(这有助于提高电话装置的安全性能。)由此可知，更改电话装置是为了“提高安全性能(extra security)”。
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