【判断题】已知反应2A→P,A的半衰期与其初始浓度成正比,此反应为零级。
【判断题】正交实验法中,实验数据的统计分析在数理统计中称为概率分析。( )
【简答题】Other tests have shown that laughter appears to be able to reduce the effect of pain on the body.
【单选题】The phrase 'scale down 'in Para. 3 probably means to ______ .
A.
reduce the proportion of the size properly
B.
reduce according to the fixed pattern
C.
make it diminish infinitely
D.
cut down the time properly
【判断题】已知反应2A→P为零级反应,A的半衰期为30分钟,由此可知,A消耗3/4所需的时间为45分钟
【判断题】已知反应 2A→P 为零级反应, A 的半衰期为 30min ,由此可知, A 消耗 3/4 所需时间为 45min 。( )