竞争性抑制剂对酶动力学参数的影响是

A、表观K[img=~/QImg/Tiles/YA54_017_33.gif]下降，表观V[img=~/QImg/Tiles/YA54_017_33.gif]下降
B、表观K[img=~/QImg/Tiles/YA54_017_33.gif]升高，表观V[img=~/QImg/Tiles/YA54_017_33.gif]下降
C、表观K[img=~/QImg/Tiles/YA54_017_33.gif]下降，表观V[img=~/QImg/Tiles/YA54_017_33.gif]不变
D、表观K[img=~/QImg/Tiles/YA54_017_33.gif]不变，表观V[img=~/QImg/Tiles/YA54_017_33.gif]下降
E、表观K[img=~/QImg/Tiles/YA54_017_33.gif]升高，表观V[img=~/QImg/Tiles/YA54_017_33.gif]不变