Plants: flowers, cat, dog, mother and father
pictures,stands, silhouettes, vase, blender
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.
As we know,nowadays egological problems are spreaded everywhere.They are:traffic jam,noise,pollution of air,water and others.It's even met in England.People are bothering..The air,and sea became very dirty,a lot of waste can be met in the streets and even in the roads,there are any forests and animals.Noises from car and trains,constant traffic jams can influence the live of people themselves.We must take care our nature!