下列特征为细胞凋亡所特有的是()
A.它是一种成群细胞的死亡
B.凋亡过程中细胞核溶解破碎
C.细胞核随机断裂
D.凋亡细胞的细胞器完整
E.可有炎症反应
参考答案:D
— You should have a part-time job during the summer holidays.
— I don’t you, Mum. I am too young to do that.
A.come up with
B.catch up with
C.get along with
D.agree with
粘性流体总水头线沿程的变化是:()
A.沿程下降
B.沿程上升
C.保持水平
D.前三种情况都有可能