题目

Finding her car stolen, _______. A. a policeman was asked to help  B. the area was searching thoroughly C. it was looked for everywhere D. she hurried to a policeman for help 答案：D 解析: D。非谓语动词作状语时，其逻辑主语就是句子主语。比较四个选项，finding her car stolen 的逻辑主语显然是 she，而不是 a policeman, the area, it 等，故选 D。某农科所通过如图育种过程培育出了高品质的糯小麦，相关叙述正确的是( )A. 该育种过程中运用的遗传学原理是基因突变B. a过程能提高突变率，从而明显缩短了育种年限C. a.c过程都需要使用秋水仙素，都只能作用于萌发的种子D. 要获得yyRR，b过程需要进行不断的自交来提高纯合率