单选题Nowcasts used to be impracticable because______.Athere were no conventional computersBthe cost of the equipping and operating was sky-highCthere were no difficulties in data processingDthere were not enough meteorologists
单选题
Nowcasts used to be impracticable because______.
A
there were no conventional computers
B
the cost of the equipping and operating was sky-high
C
there were no difficulties in data processing
D
there were not enough meteorologists
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