下列哪些项是腹泻病时低钾血症的表现()
A.腱反射亢进
B.腹胀、肠鸣音减弱
C.心音低钝
D.EKG示ST段降低,T波平坦
E.EKG示T波高尖
参考答案:B, C, D
What time does Mary after school?[ ]
A. does her homework
B. do her homework
C. do her homeworks
D. does her homeworks
在自然情况下,天然水的水质也常有一定的变化,这种变化属于水体污染