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【单选题】
A college student may experience stress in the following situations EXCEPT ______.A.
when he is making an important decision
B.
when his self-esteem is being threatened
C.
when he is working hard for a homework assignment
D.
when he is doing physical exercise
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举一反三
【简答题】若A→2B的活化能Ea,而2B→A的活化能为Ea'。加入催化剂后Ea和Ea'的变化程度是否相同?( );加不同的催化剂Ea的数值变化( );提高反应温度后Ea和Ea'值( );改变反应起始浓度后,Ea是否改变?( )。
【判断题】The sentence “Angrily, bitterly, and with tears in her eyes, Jean finally retired” is unified and coherent.
A.
正确
B.
错误
【简答题】The Embden-Meyerhof pathway and the phosphate cycle are not the only pathways of glucose metabolism, though they are by far the most common.
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