单项选择题

进站引导信号显示为一个红色灯光和一个月白色灯光。（）
A. 对

B. 错

你可能感兴趣的试题

多项选择题

Why is nominalization Commonly Used in ETTE? A.
Being objective B.
Being succinct C.
Being professional D.
Being accurate

求下列函数在给定点处的导数
(1)
(2)

答案： (1)

(2)