用凯氏定氮法测定食品中的氮，待滴至瓶内溶液呈暗灰色时，若振摇后复现绿色，应再小心滴入()半滴，振摇1～2min不褪色，当视为到达滴定终点。
A. 标准盐酸溶液
B. 标准草酸溶液
C. 标准硝酸溶液
D. 标准硼酸淫
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Why are doctors-in-training called medical residents according to Dr. Nuckols？
A. Because they are trained in their own residence.
Because they are internists who have to work on shift.
C. Because they work overtime and often sleep in the hospital.
D. Because they have to work longer hours during training.
That emerging businesses attaches less attention to nurturing culture is mentioned to______.
A. show the importance of corporate culture in the times of turbulent society
B. show difference between theorists and the new business
C. show private sectors can take page from military category
D. show military mottoes also make warriors cry
The word "derision"(Line 1, Para. 3)most probably means______.
A. ridicule
B. consequence
C. thought
D. craze
Why the English military club members are about to look into business arena？
A. They have duty to guard the Russian business invasion.
B. They want to tap the oversea market with help of Harrods.
C. They want to know the practicability of business skills.
D. They are facing the downscaling of military sector.
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