题目内容

按处理程度划分,一级处理主要去除污水中的( )。

A. 呈悬浮状态的固体污染物质
B. 溶解态有机物
C. 色度
D. 氮磷污染物

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SVI的单位是( )。

A. mg/L
B. g/L
C. mL/g
D. g/mL

What can be done if a guest request to make the room when he/she is out but nothing has been done when he/she comes back?

A. send a room attendant to clean the room right away
B. offer a complimentary drink in the coffee shop
C. offer a dinner coupon
D. make an apology

The room ___________________, and there are no fresh towels in the bath room.

A. had not been make
B. has been made
C. has not been made
D. has been make

A: Housekeeping Department. Can I help you? B: Yes, the toilet is ____________ and won’t _____________ properly.

A. clog, flushed
B. clogged, flush
C. block, flushed
D. blocked, flush

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