传统电泳与等电聚焦电泳的主要区别在于:介质中是否加入了两性电解质载体。()
参考答案:对
阅读理解
Hello! I'm Ren Lijuan. R-E-N, Ren. L-I-J-U-A-N, Lijuan. I'm ten and I'm a student. I'm in Class 6, Grade 4. I like playing tennis. I have five tennis balls and a tennis racket. Lei Hao is my classmate(同班同学). He is eleven. He likes baseball. He has two baseball bats and four baseballs. He also has two tennis
rackets. Miss Niu is my English teacher. Her classes are interesting and fun. She is a good teacher and we all like her. Do you want to make friends with me?
1. who is an English teacher?
A. Ren Lijuan.
B. Miss Niu
C. Lei Hao
D. Mr. Niu
2. How old is Ren Lijuan?
A. He is ten.
B. I'm ten.
C. She is ten.
D. He is eleven.
3. What class is Lei Hao in?
A. He is Class 4.
B. He is in Grade 6.
C. He is in Class 6.
D. I don't know.
4. Lei Hao has _________ tennis racket(s).
A. one
B. two
C. five
D. four
5. How are their English classes?
A. They are boring.
B. They are happy.
C. They are interesting.
D. They are difficult.
发票准印证由()统一监制,省税务机关核发。
A、地方税务局
B、国家税务局
C、税务局
D、国家税务总局