单选题
10.
The ship's generator broke down, and the pumps had to be operated ______ instead of mechanically.
A、
artificially
B、
automatically
C、
manually
D、
synthetically
【正确答案】
C
【答案解析】
轮船上的发电机坏了,只能用人工来代替机械操作水泵了。
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