变形虫的任何部位都可以伸出伪足向前移动这一过程依赖于细胞膜的[ ]
A.流动性
B.保护作用
C.隔离作用
D.选择透过性
答案:A
开放作文。
In your spoken English class, your teacher shows you the following picture. You are asked to
describe the picture and explain how you understand it.
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以下关于高钾血症的诊断哪项正确()
A.血清钾浓度4~5mmol/L为轻度高钾血症
B.血清钾浓度5.5~6.5mmol/L为轻度高钾血症
C.血清钾浓度6.0~6.5mmol/L为中度高钾血症
D.血清钾浓度>6.5mmol/L为重度高钾血症
E.血清钾浓度>7mmol/L为重度高钾血症