单项选择题
After receiving the stores you should sign on the （）
A.engine logbook B.delivery docket C.store list D.maintenance book
单项选择题 When order spare part, you can directly fall back on （）
单项选择题 The（） should be shut once upon FWE.
单项选择题 The （）should be kept running for about half an hour after FWE.
