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单选题
293.APU的正常停车时,ECB模拟的是( ) To shut down the APU normally, the ECBSimulates:
A
超速 an overspeed signal.
B
超温 an overtemperature signal.
C
过载 an overload signal
答案解析
正确答案：A
解析：
APU的正常停车时，ECB模拟的是( ) To shut down the APU normally, the ECB simulates: A. 超速 an overspeed signal. B. 超温 an overtemperature signal. C. 过载 an overload signal 答案: A
题目解析： 在正常停车时，APU的关闭是通过监测其工作状态并发送相应的信号来实现的。ECB（电子控制盒）用于控制和监测APU的各种操作。在这种情况下，APU正常关闭时会模拟超速信号，因为超速可能会导致潜在的危险。因此，正确答案是A。
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