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74LS138 译码器有 个 译码输入端和 个译码输出端。
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举一反三
【单选题】From the dialogue we can see that
A.
Pam has written a report.
B.
Frank has written a report for the meeting.
C.
Jane is writing a report for next meeting.
【单选题】There will be a  _____ TV report of tonight’s football match and we can enjoy it together.
A.
alive
B.
living
C.
live
D.
lively
【判断题】由于加工、安装误差导致中心距改变时,渐开线齿轮不能保证瞬时传动比不变。
A.
正确
B.
错误
【单选题】From the report, we can conclude that______.
A.
the study revealed the relation between infant deaths and nuclear plants
B.
the study contained infant deaths of many years before the plant closed
C.
the reduction of infant deaths was steady
D.
the scientists have not drawn a clear conclusion
【单选题】What can we infer from the report?
A.
Politicians would have to spend a lot of time handling any upcoming problems online.
B.
The cyberspace can not only be used by politicians but also use politicians.
C.
Online enthusiasm of the netizens can be translated into votes in the election.
D.
The ultimate goal for the politicians to use the Internet is to raise money online
【单选题】在运输距离已定的情况下,额定载重量范围内,随装载量的增加,单位运输成本会( )
A.
保持不变
B.
上升
C.
下降
D.
不确定
【单选题】听力原文:M: Is there any way we can get a draft of the quarterly report by the end of the week. W: Only if you're willing to assign more manpower to the project. Could you make arrangement about it by thi...
A.
Have more people work on the report.
B.
Finish the report himself.
C.
Write the report this afternoon.
D.
Allow more time to finish the report.
【单选题】From the news item, we can see that Newsweek magazine retracted its report because ______
A.
Bush administration had pressured it to
B.
the interrogators had already apologized
C.
the report leaded to unexpected reactions
D.
the report was invented by a reporter
【简答题】What the correspondent sent us is an ________ news report. We can depend on it. A) evident B) authentic C) ultimate D) immediate
【简答题】Although there are occasional outbreaks of gunfire, we can report that the rebellion has in the main been ________. A) canceled B) destroyed C) suppressed D) restrained
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