According to the experiments, many blind people
A. sleep at daytime.
B. can sleep at any time.
C. have different sleep cycle with sighted people.
D. have the same sleep cycle as sighted people.
《广西食品小作坊小餐饮和食品摊贩管理条例》规定，食品小作坊登记证有效期为()年。
A两
B一
C三
D四
《海洋环境保护法》规定，对具有重要经济、社会价值的已遭到破坏的海洋生态，可以不进行整治和恢复。()
When The Da Vinci Code was first published, Doubleday
A. hoped that it would become a historic publication.
B. only expected to sell no more than 85,000 copies.
C. had great confidence in the book and its author.
D. announced a conservative printing of the book.
微信支付 
支付宝支付