将发亮的银匙插到煮熟的蛋白中数分钟后,插入部分会变黑,这表明蛋白中含有()
A.碳
B.磷
C.氧
D.硫
参考答案:D
In this lecture, I can only give you a purely ________ view of how we can live life to the full and make
some suggestions about the future. [ ]
A. private
B. personal
C. unique
D. different
呼吸监测最直接的指标是()
A.呼吸频率
B.有无发绀
C.血氧饱和度
D.血气分析
E.肺功能测定