题目

 -We plan to go out for a picnic next weekend. Would you like to come along?  -                       .  It's my favorite.   A. Me too  B. It doesn't matter   C. You're welcome   D. That would be nice 答案： D有下列光学器具：①照像机、②潜望镜、③幻灯机、④穿衣镜、⑤放大镜、⑥牙医内窥镜，可以把它们分成两类：一类包括潜望镜、穿衣镜、牙医内窥镜潜望镜、穿衣镜、牙医内窥镜，其特征是利用光的反射原理制成利用光的反射原理制成．一类包括照相机、幻灯机、放大镜照相机、幻灯机、放大镜，其特征是利用光的折射原理制成利用光的折射原理制成．