真核细胞转染的脂质体（liposome)法基本原理。

Section A

Directions: This section is to test your ability to give proper answers to questions. There are 5 recorded questions in it. After each question, there is a pause. The questions will be spoken two times. When you hear a question, you should decide on the correct answer from the 4 choices marked A, B, C and D.

(1)

A．Surely.

B．Yes, of course.

C．Good idea.

D．why not？

Section A

Directions: This section is to test your ability to give proper answers to questions. There are 5 recorded questions in it. After each question, there is a pause. The questions will be spoken two times. When you hear a question, you should decide on the correct answer from the 4 choices marked A, B, C and D.

(1)

A．Thank you.

B．With pleasure.

C．Oh, yes.

D．Here you are.

Section A

Directions: This section is to test your ability to give proper answers to questions. There are 5 recorded questions in it. After each question, there is a pause. The questions will be spoken two times. When you hear a question, you should decide on the correct answer from the 4 choices marked A, B, C and D.

(1)

A．Yes, all right.

B．Yes, it is.

C．Yes, this is mine.

D．Yes, that's right.

Section A

Directions: This section is to test your ability to give proper answers to questions. There are 5 recorded questions in it. After each question, there is a pause. The questions will be spoken two times. When you hear a question, you should decide on the correct answer from the 4 choices marked A, B, C and D.

(1)

A．That's OK.

B．I'm sorry.

C．Impossible.

D．Wonderful.

Section A

Directions: This section is to test your ability to give proper answers to questions. There are 5 recorded questions in it. After each question, there is a pause. The questions will be spoken two times. When you hear a question, you should decide on the correct answer from the 4 choices marked A, B, C and D.

(1)

A．At 5:30.

B．In the cinema.

C．At home.

D．Yes, I do.

Section A

Directions: This section is to test your ability to give proper answers to questions. There are 5 recorded questions in it. After each question, there is a pause. The questions will be spoken two times. When you hear a question, you should decide on the correct answer from the 4 choices marked A, B, C and D.

(1)

A．Yes, it is.

B．No, thanks.

C．Never mind.

D．Certainly.

Section A

Directions: This section is to test your ability to give proper answers to questions. There are 5 recorded questions in it. After each question, there is a pause. The questions will be spoken two times. When you hear a question, you should decide on the correct answer from the 4 choices marked A, B, C and D.

听力原文：Was your brother at home this morning？

(1)

A．Yes, I was.

B．Yes, I would.

C．Yes, he did.

D．Yes, he was.

Section A

Directions: This section is to test your ability to give proper answers to questions. There are 5 recorded questions in it. After each question, there is a pause. The questions will be spoken two times. When you hear a question, you should decide on the correct answer from the 4 choices marked A, B, C and D.

(1)

A．Nothing else.

B．Pretty well.

C．Four languages.

D．With his roommates.

Section A

Directions: This section is to test your ability to give proper answers to questions. There are 5 recorded questions in it. After each question, there is a pause. The questions will be spoken two times. When you hear a question, you should decide on the correct answer from the 4 choices marked A, B, C and D.

(1)

A．A good idea.

B．No problem.

C．My pleasure.

D．Of course not.