【单选题】The electric shaver needs ______ before it can be used.
【判断题】在充电过程中,为了冷却车载充电器可能会自动接通电动冷却液泵和电子扇。( )
【单选题】茯苓能增强黄芪补气利水的效果,属于配伍关系的:
【判断题】After using an electric shaver, he has to go back over his chin
with a regular razor to have a clean shave by shaving
off what gets away from the electric shaver.