下列函数为奇函数的是( )
A:y=x
B:y=ex
C:y=cosX
D:y=ex-e-x
西藏野牛休息时,体态与岩石相似,有利于捕食和御敌.这种现象体现了( )
已知数列{an}的前n项和Sn=2an﹣2n+1,若不等式2n2﹣n﹣3<(5﹣λ)an对∀n∈N*恒成立,则整数λ的最大值为( )
下列说法中,表示气候的是( )
回答下列问题:
doctor , like, teacher, of, tree, same, name, be, job.
Hello, my____ is Li Ming. I am 14 years old.I go to Ximen School. This is a photo ____ my family. They____ my parents. He is my father and she is my mother. My father is 40 years old and my mother is 38 years old.My father is a ____in a hospital . My mother is an English____ in my school.My sister is 12 years old .We are in the ____ school .There are two big____ in front of my house. I____ my family.