【单选题】The police officer used a megaphone .
C.
an instrument to make one's voice louder
D.
a telephone in the car
【单选题】在电控系统中,用来判断各缸上止点的传感器是。( )
【单选题】The police officer questioned the man because
A.
he had seen him do a strange thing.
B.
he thought he knew him.
C.
the man had fallen and needed attention.
D.
the man had tried to escape from a window.
【判断题】接触60mA以下的电流通常不会有生命危险。
【简答题】A.George Washington. B.The neighbor. C.The police officer. D.Someone who was not mentioned in this passage.
【判断题】我国现存最早的一幅山水卷轴画是展子虔的千里江山图。