阻断M受体，松弛平滑肌，缓解内脏平滑肌痉挛的是( )
A．酚妥拉明B．山莨菪碱C．哌仑西平D．氯磷定E．新斯的明
参考答案：B
大多数家用电器在待机状态(关机但未拔掉电源插头)时也会消耗电能。以有1000个家庭的社区为例，假设每个家庭所有用电器待机时的总功率约为20W，每天处于待机状态的时间约为20h，则该社区每天因用电器待机而浪费的总电能约为 kW·h。
You have no idea how she finished the relay race ______ so much.
A．for her foot injured
B．when her foot injured
C．with her foot injured
D．while her foot injured
