Binary numbers need more places for counting because
A.
They are always big numbers
B.
Any no. of 0's can be added in front of them
C.
Binary base is small
D.
0's and l's have to be properly spaced apart
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【单选题】听力原文:M: Good morning, George. You're looking a bit under the weather W: I'm feeling pretty awful actually. I'm afraid I've got a cold coming. What can you learn from the conversation?