企业通常根据哪些情况来决定对不同竞争者的对策（）。

A.竞争者的强弱

B.竞争者与本企业的相似程度

C.竞争环境的变化

D.竞争者的数目

E.竞争者表现的好坏

阅读短文，根据所给的首字母完成单词。

Chocolate lovers know that eating chocolate makes them happy. Now they may a__小题1:____ become smarter by eating chocolate. Scientists let a group of people e__小题2:___ 85 grams of milk chocolate and asked a__小题3:_____ group to eat no chocolate at all. After 15 minutes, the g__小题4:___ that ate chocolate were able to remember m__小题5:___ words and p___小题6:___ than the group that did not eat chocolate. They believe that s___小题7:___ in chocolate can make people smarter. Of course, e__小题8:___ chocolate doesn’t guarantee(保证) you’ll p__小题9:__ every test. You’ll s__小题10:___ need to study hard.