问题 多项选择题 多选题

当电梯由于控制失灵,曳引力不足,制动器失灵或制动力不足,以及超载拖动钢丝绳断裂等原因,都会造成轿厢超速坠落,因此,必须有可靠的安全装置来实施保护。具有防止电梯超速事故发生的安全装置是()。

A.门开关连锁

B.限速器

C.安全钳

D.缓冲装置

E.检修运行装置

答案

参考答案:B, C

选择题
阅读理解

阅读理解。

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

     Facebook (a social networking service) makes it far too easy to make new friends-Unfortunately, reality

is not like that.   1   The difference here is that we don't get to choose our families; friends, on the other hand,

are picked, selected and developed through our life.

     It is quite funny how your best friends know exactly what your are thinking without even telling them.

   2   This friend's sixth sense is something that takes time to develop through many long-lasting experiences

that your go through.

     I was once asked: which one would be the worst thing, to lose all your loved ones or to lose all your

friends?   3   I believe that I couldn't live a day if I had lost all my friends.

      Respect, loyalty (忠诚), and support are few of the qualities that will form a good friendship. There are

many others for sure, but it is enough for you to get these. 

       4   The ability to trust someone and therefore, be trusted, can be only built with a lot of effort and time.

     I hate that ugly Facebook's message "Add to your friends?" It is like a friends was something that you

could simply add to your "portfolio (文件夹)" without feeling.   5   

A. My answer was certainly the latter.

B. This is definitely not the way to make friends.

C. This is not something that happens overnight.

D. Life without friends is just like soup without salt.

E. We need friends to help us when we meet with difficulties.

F. Trust is also one of the major features of a good relationship.

G. Friends sometimes are just as important to us as our families.