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【单选题】
在使用万用表直流电流档测量直流电流时,要注意电源的极性并正确选用量程,如被测电流()电流表量程,必须采取扩大量程的方法。A.
A小于
B.
B接近且小于
C.
C远远大于
D.
D远远小于
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举一反三
【单选题】Which of the following can be learned from Para.2?
A.
People over 50 spend less money on luxury items.
B.
Young people have become more economic because they earn less money.
C.
The increase of older generations has helped growth of American economy.
D.
Middle-aged or elderly models are more welcome in American commercials today.
【单选题】The expression 'more lenient'(Line 2, Para. 4)is closest in meaning to
A.
less controversial.
B.
more effective.
C.
more lasting.
D.
less severe.
【单选题】The word 'footnote' (Para. 1) means that the influenza in 1957 _____.
A.
was less important in American medical history
B.
imposed little influence on American population
C.
was less serious in terms of death toll
D.
got less attention of American medical experts
【简答题】An adjective meaning not changing. (Para 8)
【简答题】Para 8 ______
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