离体肝线粒体中加入氰化物和丙酮酸，其P/O比值是
A．3B．2C．0D．1
参考答案：C
解析：离体肝线粒体中加入氰化物和丙酮酸，其P/O比值是0。
Grandma ______ a bad cold since last Saturday.[ ]
A. has got
B. has taken
C. has had
D. has caught
埋弧机组与纵剪机组的圆盘剪有什么不同之处？
