【简答题】It’s a problem that every year thousand of people get hurt or die when they are crossing the road.Most of these people are old people and children.Old people often get hurt or die because they can’t s...
【单选题】底物浓度达到饱和后,再增加底物浓度:
C.
酶的结合部位全部被底物占据,反应速度不再增加
【单选题】With the increase of the people’s income, there is a growing ______ for Chinese students to go abroad for further education.
【简答题】阅读材料回答问题: 鲁迅先生在《从百草园到三味书屋》一文中有这样一段描写:“不必说碧绿的菜畦,光滑的石井栏,高大的皂荚树(A),紫红的桑葚;也不必说鸣蝉(B)在树叶里长吟,肥胖的黄蜂(C)伏在菜花上,轻捷的叫天子(云雀)(D)忽然从草间直窜向云霄里去了。单是周围的短短的泥墙根一带,就有无限趣味。油蛉(E)在这里低唱 ,蟋蟀(F)们在这里弹琴。翻开断砖来,有时会遇见蜈蚣(G);还有斑蝥,倘若用手指按...
【判断题】Chinese people celebrate New Year’s Day on unfixed date in February.()
【单选题】底物浓度达到饱和后,再增加底物浓度:
C.
酶的结合部位全部被底物占据,反应速度不再增加