1) During this period the track structure has been substantially improved.
One of the greatest improvements was the elimination of rail joints. In
order to reduce the number of joints the rails are welded into
continuous lengths.These continuous or long welded rails have greater
strength and provide a smoother running of trains at far greater speeds.
2) Another improvement which has made it possible to increase speeds on
railways is the use of concrete sleepers. Thus in some countries ,
concrete sleepers have replaced wooden ones on heavily used main lines
because of their advantages.
Concrete sleepers have a longer life
and a far greater weight than those made of wood. The greater weight of
concrete sleepers provides the greater stability of track.
It is this factor which has greatly contributed to increased speeds.
Ответ взял прямо из текста. Насколько я помню, так надо делать в подобных заданиях.
1) I am playing tennis with my friend now.
2) We are walking on the beach now.
Ответ:
My favorite gadget to communicate with friends it's smartphone. Becouse it has many massengers for communicate and i can call them
Объяснение:
Вроде так, перевод: Мой любимый гаджет для коммуникации с друзьями это смартфон(телефон). Потому что в нем много мессенджеров для связи и я могу позвонить им
1 has she come back from work? - not yet, usually she comes back at 6.
2 Do you like books by Grisham? - yes, i'm actually readying one of them right now. - Have you been reading this novel for long? - Yes, I am almost done.
3 Yesterday, when I went out of the theatre, I met my old friend, whom I haven't seen for ages.
4 Have you ever been to Ireland? - Yes. - When did you go there? - Last year
5 I had been texting with this guy fro England for 2 years, when he finally came to Moscow to meet me.
6 Usually he goes to work by bus, but today he overslept so he's going to work by taxi
7 In the morning i woke up, took a shower, had a breakfast, and went to work.
8 My sister has been living in Germany for 3 years. In 1999 she got married and since then hasn't been to Russia
9 He wants to be enrolled to the 2nd year of university right away, because she already finished a college in St.Petersburg.
10 He had been studying at the university of r3 years when he decided to drop it. By that time he had been working for a couple of months
If to speak about sports I'd like to do, I would choose swimming. This kind of sport has certain physical and psycological advantages.
Swimming helps to loose weight and makes your body lissom .It develops muscles and strengthens your heart. Besides swimming
helps to get rid of stress,because being in warm water gives you calm emotions.And what's more, this activity is a perfect way of socialization
<span>and finding new friends. </span>