試卷名稱:100年 - 100 新北市國民小學暨幼稚園教師甄選:英語#5108
年份:100年
科目:教甄◆英文-國小
47. According to the passage, what kind of signal has long periods of light that are regularly broken by two or more periods of darkness?
(A) Group occulting.
(B) Flashing.
(C) Occulting.
(D) Group flashing.