题目内容

乙炔能使溴水褪色，发生的反应属于（）

A. 氧化反应
B. 取代反应
C. 加成反应
D. 还原反应

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炔烃能发生以下哪些反应

A. 加成反应
B. 氧化反应
C. 取代反应
D. 以上都是

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A Room Attendant performs routine duties of cleaning guest rooms and bath rooms under the supervision of the inspector, such as

A. Dusting should be done daily
B. Ashtrays and wastebaskets must be properly emptied
C. Floors and carpets should be thoroughly vacuumed
Do not leave dirty things in wash basins, bathtubs, or toilet bowls.
E. Remove used towels and replace them with fresh ones properly.

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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

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乙炔能使溴水褪色，发生的反应属于（ ）

A. 氧化反应 B. 取代反应 C. 加成反应 D. 还原反应

炔烃能发生以下哪些反应

A Room Attendant performs routine duties of cleaning guest rooms and bath rooms under the supervision of the inspector, such as

In accordance with the regulations, the VIP guests should be given______ before check-in.

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.

乙炔能使溴水褪色，发生的反应属于（）

A. 氧化反应
B. 取代反应
C. 加成反应
D. 还原反应