能裂解生成尿素的直接物质是
A.氨基甲酰磷酸B.鸟氨酸C.瓜氨酸D.精氨酸E.精氨酸代琥珀酸
参考答案:D
First impressions are the most lasting. After all, you never get ___ second chance to make ___ first
impression.[ ]
A. a; the
B. the; the
C. a; a
D. the; a
血分证与营分证的共有症状是( )
A.颈项强直
B.身热夜甚
C.手足蠕动
D.吐血衄血
E.目睛上视