In accordance with the regulations, the VIP guests should be given______ before check-in.
A. a bottle of wine
B. a fruit bowl
C. flowers
D. a business card of the general manager
E. a private butler
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After the guest checks in, the P.A. attendant shall immediately clean the room every time the guest goes out, and be sure to keep the room clean before the guest returns to the room.
A. 对
B. 错
商业银行被称为发行的银行、银行的银行和政府的银行。
A. 对
B. 错
调速器中使用的润滑油在使用温度范围内应满足下述要求________。①有适当的黏度②不腐蚀密封材料③不发生污染④不发生氧化变质⑤有适当的碱值⑥有适当的浮游性
A. ①②⑤
B. ②③④
C. ①②④
D. ②④⑥
液压调速器在运行中发生故障,其主要原因可能是________。
A. 滑油脏污
B. 动力活塞咬死
C. 调速器补偿阀堵塞
D. 滑阀与滑阀套筒磨损