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【单选题】
在型号为FR-740的三菱变频器参数设置中，参数Pr.2设定的是______________ 。A.
下限频率
B.
上限频率
C.
加速时间
D.
减速时间
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【单选题】听力原文：M: Is this the checkin counter for flight 914 to Los Angels? W: Yes. But I'm sorry the flight is delayed because of a minor mechanical problem. Please wait for further notice. Q: What do we learn...
A.
The man went to a wrong checkin counter.
B.
The man has just missed his flight.
C.
The plane will leave at 9:14.
D.
The plane's departure time remains unknown.
【单选题】According to the notice, how does Newtown Gas estimate the amount of gas used?
A.
By checking records of a customer's previous gas usage
B.
By taking the average home usage for the month
C.
By adding a fixed amount to the past month's usage
D.
By determining gas usage at neighboring homes
【简答题】checkin.mp3:
【单选题】information is very important needed for the next day’s paper.
A.
Examing
B.
Testing
C.
Operating
D.
Checking
【简答题】Big data will enable us ( collect ) and yze information about large populations.
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