基托蜡型的厚度一般为()
为避免损伤牙龈组织，上颌前牙区舌侧基托边缘应远离龈缘()
装盒时，人工牙的面与上层型盒顶部之间的间隙至少应该有()

A．1.5～2.0mm

B．2.0～4mm

C．4～6mm

D．6～8mm

E．10mm以上

读短文，根据短文内容选择正确答案。

      Mike comes from America. He is twelve. His father Mr. Brown works in a big shop in Beijing. Mike has a

sister. Her name is Kate. She is only four.

      It is Saturday today. Mike's family is at home. Mr. Brown is sitting in a chair and reading today's newspaper.

Mrs. Brown is out of the house, and she is watering the flowers. Is Mike with his mother? No, he is cleaning his

new bike. Where is Kate? She is in her room. She is playing with her cat. What a happy family!

1. Mr. Brown works ______________.

A. in America

B. in a bank

C. in Beijing

D. at home

2. Who is Kate?  She is ______________. 

A. only four

B. Mike's sister

C. playing

D. at home

3. Mrs. Brown is ______________.

A. in the house

B. cleaning her new bike

C. sitting in a chair

D. watering the flowers

4. Mike is ______________.

A. cleaning his new bike

B. with his mother

C. in his room

D. sitting in a chair

5. Kate is playing with ______________.

A. Mike

B. Mr. Brown

C. Mrs. Brown

D. her cat