单选题：Theship’sgeneratorbrokedown,andthepumpshadtobeoperated（　　）in

题目内容：

Theship’sgeneratorbrokedown,andthepumpshadtobeoperated（　　）insteadofmechanically. A．artificially
B．automatically
C．manually
D．synthetically

参考答案：

答案解析：

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