已知某气相反应 2 A→2B+C 的速率常数 k 的单位为 dm 3 · mol -1 ·s -1 ,在一定温度下开始反应时, c A,0 =1 mol · dm -3 ,若 A 反应掉 3/4 c A,0 所需时间 t 3/4 与反应掉 1/2 c A,0 所需时间 t 1/2 之差为 600s ,则 t 1/2 = ( )。
A.
300s
B.
600s
C.
900s
D.
无法确定
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【单选题】People have wondered for a long time how their personalities and behaviors are formed, h is not easy to explain why one person is intelligent and another is not, or why one is cooperative and another ...
A.
A person's instincts have little effect on his action
B.
Environment is important in determining a person's behavior. and personality
C.
Biological reasons have a strong influence on how we act
D.
The behaviorists' view correctly explains how we act