目前尿蛋白的首选筛检试验
A. 干化学试带法
B. 加热乙酸法
C. 磺基水杨酸法
D. 丽春红法
E. 考马斯亮蓝法
The stranger said something in a _______ voice and the little girl was very much _______.
A. frightening, frightened
B. frightened, frightening
C. frightening, frightening
D. frightened, frightened
________the piano, someone suddenly knocked at the door.
A. Playing
B. When I was playing
C. Repairing
D. Examining
Mother caught the boy ______ in the corner.
A. smoke
B. to smoke
C. being smoked
D. smoking
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