问题
选择题
More and more heart patients are surviving thanks to improved surgical _______. [ ]
A. techniques
B. skills
C. abilities
D. system
答案
答案:A
More and more heart patients are surviving thanks to improved surgical _______. [ ]
A. techniques
B. skills
C. abilities
D. system
答案:A
在一定温度下,2L密闭容器内,反应2NO(g)+O2(g)⇌2NO2(g)体系中,n(NO)随时间的变化如下表:
时间/min | 0 | 1 | 2 | 3 | 4 | 5 |
n(NO)/mol | 0.020 | 0.010 | 0.008 | 0.007 | 0.007 | 0.007 |
A.3 min
B.1 min
C.2 min
D.0 min