问题 问答题

简述对塑料塑化的要求。

答案

参考答案:

(1)塑料熔体进入模腔之前要充分塑化;即达到规定的成型温度。

(2)塑化料各处的温度要均匀一致。

(3)热分解物的含量降到最小值。

阅读理解

Pieter Bruegel was a famous artist who lived in Europe five hundred years ago. He is well known for a painting called Children’s Games. People like this painting because it is full of fun. It shows how children in Pieter’s time enjoyed themselves in different ways. In all, there are about eighty games being played in the painting.

Children’s Games shows a busy street scene in a town long ago. The street is a wide and open space. There are no cars, so there is plenty of room to play. There are about two hundred children in the painting. Some play in groups and others play alone. They seem to be enjoying their freedom in the fresh air and their games. Some of the games are still played today.

The games in the painting do not require children to spend money on extra materials(材料). Instead, they use simple everyday objects like hats and sticks. A game might need a rope, some chalk, a hoop, a spinning top, or even a barrel. Some games are played without any toys at all. For example, one scene in the painting shows children turning somersaults(翻筋斗) inside the fence.

Even though Pieter Bruegel lived a long time ago, children today can learn an important lesson from what he painted. The painting shows us how little we need in order to enjoy ourselves. All children really need is one another. It’s not the toys or games that are found in the stores that create fun. Using our imagination can do this for us. 

小题1:The painting shows about ______ games.

A.500

B.200

C.80

D.60小题2:The children in the painting are playing ______.

A.in the street

B.in the house

C.on the grass

D.at the school小题3:From the painting we learn that ______.

A.children today need to take more lessons

B.children can create fun by using imagination

C.children need more toys to enjoy themselves

D.children spend much money on everyday objects

单项选择题