During the English news clip, how many flights has been cancelled in Shenzhen airport yesterday()
A. 100
B. 120
C. 200
D. 220
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During the English news clip, which factor results in the flight delays and cancellations in southern China()
A. ground fog
B. heavy snow
C. typhoon
D. thunderstorm
How to pronounce the train number begins with ‘K’()
A. Kei
B. Ke
C. Kuai
D. Ka
眼球的最内层为_____()
A. 视网膜
B. 脉络膜
C. 巩膜
D. 角膜