以下根据菲德勒权变理论的观点，错误的论述是（ ）。A．菲德勒权变理论认为领导者的领导

真空中两个点电荷Q₁、Q₂，距离为R，当Q₁增大到原来的3倍，Q₂增大到原来的3倍，距离R增大到原来的3倍时，两电荷间的库仑力变为原来的（　　）

A．1倍

B．3倍

C．6倍

D．9倍

根据句意，用括号内所给单词的适当形式填空。

小题1:---How is your business going?

--- It couldn’t be _______ (bad).

小题2:Each of us _______ (breath) heavily after running on the playground every morning.

小题3:For everyone’s _______ (safe), we should always remember the law against driving after drinking.

小题4:Such a camera can help spacemen film _______ (they) during the flight.

19．From this year’s poor results, one can see ______ many changes have been made in the football team and that, sadly, it is no longer ______ it once was.

A．that; what

B．what; that

C．what; when

D．that; where

非师范学校()承担培养和培训中小学教师的任务。

A．不应当

B．应当

C．需要

D．不需要

在手功能康复中保护关节，不应该采用以下哪项治疗措施

A．限制关节主动运动

B．必要时采用矫形器进行保护

C．局部不耐受较大的压力

D．设计省力活动模式

E．合理的安排环境