问题 问答题 简答题

电梯与自动扶梯的抱闸双触点的检验要求有何相同和不同的地方

答案

参考答案:

要点:

相同点:都有两套独立的电气装置;

停车后,任一个还没有断开,应不能重新启动。

不同点:电梯两套独立的电气装置是切断制动器电流

扶梯两套独立的电气装置是切断主机电流

电梯:切断制动器电流至少应由两个独立的电气装置实现。当电梯停止时,如果其中一个接触器的主触点未打开,最迟到下一次运行方向改变时,应防止电梯再运行。

扶梯:制动系统供电的中断至少应有两套独立的电气装置来实现。这些装置可以中断驱动主机的电源。如自动扶梯或自动人行道停车以后,这些电气装置中的任一个还没有断开,应不能重新启动。

阅读理解

The UK has a well-respected higher education system and some of the top universities and research institutions in the world. But to those who are new to it all, sometimes it can be confusing.

October is usually the busiest month in the college calendar. Universities have something called Freshers’ Week for their newcomers. It’s a great opportunity to make new friends, join lots of clubs and settle into university life.

However, having just left the comfort of home and all your friends behind, the prospect (前景) of meeting lots of strangers in big halls can be nerve-wracking (令人焦虑不安的). Where do you start? Who should you make friends with? Which clubs should you join?

Luckily, there will be thousands of others in the same boat as you worrying about starting their university social life on the right foot. So just take it all in slowly. Don’t rush into anything that you’ll regret for the next three years.

Here are some top advice from past students on how to survive Freshers’ Week:

● Learn rules. Make sure you know British social etiquette (礼节). Have a few wine glasses and snacks handy for your housemates and friends.

● Be kind. Sometimes cups of tea or even slices of toast can give you a head start in making friends.

● Be sociable. The more active you are, the more likely you’ll be to meet new people than if you’re someone who never leaves his room.

● Bring a doorstop. Keep your door open when you’re in and that sends positive messages to your neighbors that you’re friendly.

So with a bit of clever planning and effort, Freshers’ Week can give you a great start to your university life and soon you’ll be passing on your experience to next year’s freshers.

小题1:We can learn from the passage that ______.

A.Freshers’ Week usually comes in September in UK

B.all the students are required to join certain clubs in UK

C.many freshers are worried about how to fit university life

D.most of the students in the UK spend three years in universities小题2:Why does the author suggest having wine glasses and snacks handy?

A.To pass the busy university life.

B.To help make friends with other freshers.

C.To show yourself a drinker as others.

D.To enjoy the time in a happy way.小题3:The main purpose of the passage is to _______.

A.tell the newcomers how to make a new start in universities

B.introduce something about higher education system of the UK

C.inform the freshers of British social etiquette

D.advise the freshmen how to behave well in the beginning

单项选择题