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【单选题】
() 这种数字数据编码方式属于自含时钟编码。A.
非归零码
B.
脉冲编码
C.
曼彻斯特编码
D.
二进制编码
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【单选题】LEARN KEY SKILLS FOR YOUR COMPUTER - ON YOUR COMPUTER? Computers are now as commonly used in business as the telephone. Therefore, it's important that people know how to use (29) efficiently. Now, you...
A.
them
B.
it
C.
they
【单选题】Amy, I want this report typed today. --- (_______) .
A.
It will be ready in the afternoon, sir
B.
I'd like you to help me
C.
I know nothing about the report
D.
Leave it to tomorrow
【单选题】I had meant to meet you at the airport this morning but I was too busy for I ________ a report.
A.
wrote
B.
was writing
C.
have written
D.
had written
【单选题】I had meant to meet you at the airport this morning, but I was too busy for I_______ a report.
A.
wrote
B.
have written
C.
was writing
D.
had written
【单选题】—Have you finished your report yet? —No ， I ’ llfinish it in ten minutes ．
A.
． another
B.
． other
C.
． more
D.
． less
【单选题】Ami, I want this report typed today.（）
A.
It‘ll be ready in the afternoon, sir.
B.
I‘d like you to help me.
C.
I know nothing about the report.
D.
Leave it to tomorrow.
【单选题】______ notebook and report that I promised you last week.
A.
Here is the
B.
Here are the
C.
Is here the
D.
Are here the
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