(三)F企业是生产专业电气开关设备的公司，产品生产多年已处于成熟期，产品市场份额为10％。在该行业中位于前三名的企业市场份额分别为：A企业30％，B企业27％，C企业20％。该行业市场稳定，但竞争也十分激烈，特别是A企业为维持现有地位，对任何其他竞争对手的进攻都会做出迅速而有力的反应。F企业知道这些情况，采取尽量维护现有市场的做法，针对专业电气开关设备市场对售后服务的要求，主动与客户建立起了结构性关系，使客户对企业的服务形成无法通过其他途径弥补的依赖。通过这种做法，F企业以优质的客户服务，获得了客户的认同，也维持了现有的市场。请分析案例，并回答下列问题：

(2005，77)在产品的成熟期，F企业实行的是( )型策略。

A．进攻

B．防守

C．撤退

D．反击

They say that first impressions are very important. My first impression of Mrs Li was 31___ she was nervous and 32____. I think perhaps she was, 33_____ it was her first lesson 34_____ us. But now, after 35______, the class really likes 36______ with her. She is kind and 37_______, and she 38________ English so 39_____ that  40______ I can understand it! --- She avoids 41______ you feel stupid. I’ve always hated making mistakes or 42______ a word incorrectly when I speak English, but Mrs Li just smiles, 43_____ you don’t feel completely stupid! I think maybe she goes _44___ too slowly for the faster students, but for me it’s wonderful！I feel I’m going to make progress 45_____ her.

小题1:A. it               B. that

小题2:A. shy             B. relax

小题3:A. as             B. is

小题4:A. after            B. with

小题5:A. two week        B. two weeks

小题6:A. working         B. work

小题7:A. patience         B. patient

小题8:A. explains         B. explain

小题9:A. clear            B. clearly

小题10:A. even            B. every

小题11:A. to make         B. making

小题12:A. to pronounce     B. pronouncing

小题13:A. so that          B. that

小题14:A. a bit            B. bit

小题15:A. with            B. to