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【单选题】
曾被明代旅行家誉为"碧莲玉笋世界”的是( )一带的石灰岩峰林。A.
桂林、阳朔
B.
，西山
C.
，花山
D.
贵港南山、东湖
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举一反三
【单选题】When the guest asks if the hotel has baby-sitting service, we can say _____.
A.
Our Housekeeping Department has a very good babysitting service. There are some spare time babysitters directly under the Room Center .
B.
I'm sorry, we don't provide such service.
C.
I don't know.
D.
Maybe you can ask my colleagues.
【单选题】What does the man think about the hotel?
A.
It's not very bad for its price.
B.
It's pretty good for its food.
C.
It's very bad for its poor service.
D.
It's the worst one he has ever known.
【单选题】What is not true about the Novotal?
A.
It is a worldwide hotel chain
B.
Novotal has one hotel in China.
C.
Novotal in Beijing is very popular.
D.
It has studied the hotel habits of business travellers for three years.
【单选题】利用金属锌与酸作用产生新生态氧,与微量砷盐反应生成具挥发性的砷化氢,还原二乙基二硫代氨基甲酸银,产生红色的胶态银,与同条件下定量的标准砷溶液所呈色进行目视比色或在510nm浓长处测定吸收度,进行比较,以控制砷盐的限量。该方法称为( )
A.
二乙基二硫代氨基甲酸银法
B.
古蔡氏法
C.
白田道夫法
D.
硫氰酸盐法
【单选题】利用金属锌与酸作用产生新生态氧,与微量砷盐反应生成具挥发性的砷化氢,还原二乙基二硫代氨基甲酸银,产生( )的胶态银,与同条件下定量的标准砷溶液所呈色进行目视比色或在510nm浓长处测定吸收度,进行比较,以控制砷盐的限量。
A.
紫色
B.
白色
C.
黄色
D.
红色
E.
黑色
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