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【单选题】
圆的标准方程是 ,则圆心坐标和半径分别是( )A.
（-2,0），3
B.
（2,0），
C.
（-2,0），
D.
（2,0），3
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【简答题】Data Collection Methods Data collection is a 1 of collecting information from all the relevant sources to find 2 to the research 3 , test the 4 and evaluate the 5 . Data collection methods can be divi...
【单选题】婴儿腹泻伴水电解质紊乱时,下列哪一项是不正确的?( )
A.
腹泻时由于排钾过多,以致缺钾
B.
酸中毒时易致低血钾
C.
血钾低于3.5mmol/L时,临床出现缺钾症状
D.
补液后钾由尿中排出引起缺钾
E.
补液后血液被稀释,血钾相对减少
【判断题】Secondary data is data that was gathered for another purpose and already exists. ( )
A.
正确
B.
错误
【单选题】Suppose you try to open a file output.txt for writing that already exists and contains data. What happens?
A.
All existing data is erased so, when the program ends, the file contains only new data written by the program.
B.
The open operation fails and the function fopen returns the value NULL.
C.
The program terminates automatically.
D.
The file is renamed as Copy of output.txt and a new, empty file named output.txt is created.
E.
Any new data written to the file by the program is added to the end of the existing file.
【简答题】Two
Storage Devices We have known
that the CPU controlled by program can process data. Then where are the data
and the program from? The answer is storage devices. We usually divide the
storage devic...
【简答题】Insurersare already pressing motorists to accept black boxes that measure how carefully they drive: these will provide a mass of data which is likely to show that putting the car on autopilot is often...
【单选题】A well-planned agenda, posted ground rules, using a bin and ______ are the four most important keys to running the effective meetings.A. a minute B. a summary C. an introduction D. the meeting leader
A.
a minute
B.
a summary
C.
an introduction
D.
the meeting leader
【简答题】Complete the following conversation with the words in their proper forms. 1. The role of big data will be (important) _________ than ever. 2. The more data there is, (hard)________ it is to yze ...
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