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【单选题】
在 Excel 中，“（sum（A2:A4））*2” 的含义是（ ）。A.
A2与A4之比的值乘以2
B.
A2与A4之比的2次方
C.
A2、A3、A4单元格的和乘以2
D.
A2与A4单元格的和的平方
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【单选题】When combating a major electrical fire at sea, the main consideration is ___.
A.
reducing the possibility of electrical shock to personnel
B.
preventing a total loss of electrical power
C.
preventing saltwater damage to electrical equipment
D.
eliminating the toxic fumes from burning insulation
【单选题】How I wish I ________ in medicine instead of history when I was at college!
A.
had majored
B.
should major
C.
majored
D.
would major
【单选题】Which of the fire extinguishing agents listed is the safest to use when combating a class C fire?
A.
CO2
B.
Foam
C.
Water fog
D.
Soda acid
【简答题】下列作品中存在画面太 “ 灰 ” 问题的是A. B. C. D.
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