【单选题】下列关于桑塔纳2000轿车电动门窗系统的叙述,说法错误的是( )
C.
电动门窗主控开关中的安全开关不能限制右前电动门窗的升降
D.
延时继电器是保证在点火开关断开后,使车窗电路延时约50s后再断开,使用方便、安全
【单选题】I〔 〕her ability to be a good engineer.
【单选题】What was the most difficult test of her ability?
A.
To read through glass-blindfolded.
B.
To identify the colour and shape of light on a screen while securely blindfolded.
C.
To carry out tasks with someone pressing on her eyeballs.
D.
To work from behind a screen, blindfolded and with a card round her neck.
【判断题】在Java中声明变量时必须指定一个类型。
【单选题】分级延时阀具有节流作用时,其( )。 A .输入压力 Pi 小于设定压力 PS B .输入压力 Pi 上升且大于设定压力 PS C .输入压力 Pi 从大于设定压力 PS 快速下降 D . A + C