A:①图中乙酶活性的改变可能是因为其分子结构的改变
B:①图中甲酶是RNA水解酶
C:②图表示的酶可以是人体细胞内的呼吸酶
D:②图并不能反映温度对酶促反应速率的影响
有一个多用电表,其欧姆挡的四个量程分别为:“×1”“×10”“×100”“×1 k”,某同学把选择开关旋到“×100”挡测量一未知电阻时,发现指针偏转角很大,为了减小误差,它应该( )
阅读下列短文,从每小题的三个选项中选出最佳答案
It is morning now. Look at the sun, it rises in the east(东方). Look at the tree, the shadow is long. It is noon now. The sun is high in the sky. It is very hot. Look at the tree. The shadow is short. It is evening now. The sun goes down in the west(西方). Look at the tree, the shadow is long again. It is night now. The moon is high in the sky. There are some stars in the sky too.