细胞内钾大约占人体总钾的（）
A.98%
B.95%
C.92%
D.89%
E.85%
参考答案：A
— ____ . I''ll be as quiet as a mouse .
A．Yes , I won''t
B．No , I won''t
C．No , I''ll
D．Yes , I will
体细胞胚胎发生
