专四专八考试

【单选题】Questions 4 to 7 are based on the following conversation.At the end of the conversation, you will be given 20 seconds to answer the questions.
Now listen to the conversation.


The computer sends signal in the form of ______.A．electrical impulses
B．machines
C．instructions
D．automatic impulses

网考网参考答案：A
网考网解析：
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