【单选题】反应速率随着温度升高而加快的主要理由是( )
【单选题】A(n) _____ culture is one in which both public and private space are similar in size and individuals guard their public space carefully, because entry into public space affords entry into private spac...
【单选题】升高温度时,化学反应速率加快的主要原因是〔 〕
C.
分子运动速率加快,使反应物分子的碰撞机会增多
D.
反应物分子的能量增加,活化分子百分数增加,有效碰撞次数增多
【判断题】1 如果制动液落到了漆面上,让它自干,然后用一块干净的布擦掉。
【单选题】A 25-year-old man has a 5-year history of celiac sprue. Several days after a mild upper respiratory infection, he begins passing dark red-brown urine. The dark urine persists for the next 3days and th...
A.
Subepithelial electron-dense deposits
B.
Granular staining of the basement membrane by anti-IgG antibodies
C.
Mesangial lgA staining by immunofluorescence
D.
Diffuse proliferation and basement membrane thickening
E.
Thrombosis in the glomerular capillaries
【单选题】温度升高,反应速率加快的主要原因是( )
D.
改变分子能量分布,增大活化分子百分数,有效碰撞频率增大