问答题

答案： D D A C

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单项选择题

Fill in the blanks with the following words. Change the word form if necessary.
identify dictate orient transmit
deliver deny reject tremendous
14. The scientists have achieved __________ success through their years of joint efforts.

单项选择题

激励视频视频时长控制在60s内。（）

A.正确
B.错误