23． How many dangers will animals meet in the deep sea?

A．One

B．Two

C．Three

D．Four

[单选题]23． How many hours of sleep is good for students' health?A． Less than 9 hours．B． Over 9 hours．C． Only 9 hours．D． 7 hours．

[主观题]H．ow to set many-to-many relationship in Hibernate?

[主观题]Why we use index in database? How many indexes is the maximum in onetable as your suggestion?

[单选题]23． Why did I feel worried suddenly?A． I felt the bad tooth was still there．B． There was cotton-wool in my mouth．C． There was a hole in my tooth．

[单选题]23. When I got there, he _____ them to dance.A． is teaching B. teachesC. was teaching D. taught

[单选题]23．A．likesB．likeC．likingD．likeing

[单选题]23．A．aloneB．busilyC．carefullyD．happily

[单选题]23．A．sentB．rememberedC．preparedD．shared

[单选题]23． The desk is _________．A． on the bedB． behind the chairC． near the window

[单选题]How do you do? (Glad to meet you.)______________.(Glad to meet you, too.)A.