调查访谈(共5小题；每小题2分，满分l0分) 根据你的实际情况完成以下调查访谈，并在答题卡上将答案填写在时应题号的横线上。

Reporter: Excuse me. I’m doing a survey for a magazine Weekends. Can I ask you some questions?

Bob: Sure.

Reporter: 小题1:.                                      ?

Bob: My name is Bob.

Reporter: Hi, Bob! How was your last weekend?

Bob: 小题2:.                                        . I really had a good time.

Reporter: 小题3:.                                     ?

Bob: I played basketball.

Reporter: 小题4:.                                     ?

Bob: Twice a week.

Reporter: Thank you very much.

Bob: 小题5:.                        .

PET应用的是下列哪个粒子来成像

A．正电子

B．γ射线

C．X射线

D．α粒子

E．β粒子