题型:选择题 Many people who were once _______ now get better jobs after further education.A.out of troubleB.out of work C.in ruinsD.in need 查看答案
题型:单项选择题 轴流式压气机转速减小而偏离设计值时,压气机增压比().A.增大,压气机流量系数逐级减小B.减小,压气机流量系数逐级减小C.增大,压气机流量系数逐级增大D.减小,压气机流量系数逐级增大 查看答案