执政能力是掌握和行使国家权力的能力。
参考答案：错
I met Jerry in the hotel yesterday, but he didn’t tell me________.
A．which floor did he live
B．which floor he lives on
C．which floor he lived on
D．which floor does he live
配制甲烷校准气样的装置和方法必须符合国家有关标准，相对误差必须小于（）。
A.5%
B.6%
C.10%
