温度/℃
10
20
30
40
50
60
果汁量/mL
2
3
4
5
6
A:温度影响果胶酶的活性
B:若温度从10℃升高到40℃,酶的活性都将逐渐增强
C:40℃与60℃时酶的活性相等
D:该酶的最适温度一定是50℃
He advises me ____ (speak) a lot louder.
People may have different opinions about MaYun, but I admire him. , he is a successful businessman.
一弹丸在飞行到距离地面5m高时仅有水平速度v=2m/s,爆炸成为甲、乙两块水平飞出,甲、乙的质量比为3:1,不计质量损失,取重力加速度g=10m/s2,则下列图中两块弹片飞行的轨迹可能正确的是( )