【单选题】Though all of us hate Chinese style road crossing, there are still ______ people crossing the road when traffic lights are red in Yancheng. It must be changed.
【判断题】Km是反应速度为最大值时的底物浓度,可以用于判断酶对底物亲和力的大小
【多选题】关于km值叙述正确的是:
A.
km值可以表示酶与底物的亲和力,km值愈大,酶与底物的亲和力越大
B.
km值等于酶促反应速度为最大反应速度一半时的底物浓度
【单选题】下列哪项不是因基质微环境异常导致的角膜缘干细腕缺乏
【单选题】“Crossing the Bar” is a poem that _______.
A.
describes the poet’s tranquility and placid mood towards death
B.
describes the poet’s life experience of crossing the English Channel
C.
expresses the poet’s firm belief of the eternity of life
D.
reflects the poet’s fear and doubt towards afterlife
【单选题】Look around when _____ the street.
【单选题】下列哪项不是因基质微环境异常导致的角膜缘干细胞缺乏()