黄健总觉得自己在班里各方面都比别人强，他只看到别人的缺点，发现不了别人的长处，所

补全对话。

Peter: Oh, David. Please don't put anything on this desk!

David: 1_____?

Peter: Look! This leg is broken.

David: 2_____. When did you find it?

Peter: I found it just now when I was sweeping the floor.

David: Let's tell our teacher about it at once and then someone will repair it.

Peter: No. 3_____.

David: Yourself? Have you learnt to repair a desk?

Peter: Yes. My father is an expert in repairing things. 4_____.

David: Oh, your father taught you. That's great! Do you think 5_____ ourselves?

Peter: Certainly. Let's begin.

多模光纤的纤芯标称直径为（）μm或50/125μm，其标称波长为（）nm。

A.62.5/125

B.82.5/125

C.85和130

D.850和1300

在质量管理领域，考虑1.5倍漂移，六西格玛表示产品的不合格率不超过（）

A.1.5%

B.3.4%

C.1.5ppm

D.3.4ppm

下列属于新文学第一个十年的诗歌创作作品的是（）

A.《尝试集》

B.《星空》

C.《食客与凶年》

D.《新梦》

无土栽培按照耗能多少及对环境的影响划分