Read and choose.（根据上下文选择句子）

A. Wow!  It's so cute.    

B. She is jumping.

C. What can you see?  

D. What is it doing?

E. It's in her bag.

-1_____________

-I can see the mother kangaroo.

-What is she doing?

-2_____________

-What about the baby kangaroo?

-3_____________

-4_____________

-Maybe it is sleeping.

-5_____________

目前尿素自动化分析最常用的测定方法( )

A．尿素酶偶联谷氨酸脱氢酶法
B．酚-次氯酸盐显色法
C．纳氏试剂显色法
D．二乙酰一肟法
E．脲酶-波氏比色法