The greenhouse is mainly used in planting of vegetables and fruits of long-season and adopts soilless culture, planting not grown in the soil but in rock wool of bowl size instead．The growth of plants depends on nutrition liquid fed to by the computer through feeding system．
All crops will be covered with considerate cares：When indoor temperature of the glass greenhouse is lower than best temperature needed by crops, the computer will automatically commands the heating system to increase the temperature till getting the best; When the temperature higher, computer will then commands the decrease system to adjust; When the plant is in want of nutrition, the computer will automatically test and prepare according to demands of plants purposely and feed the nutrition liquid to crops through burette．
Planting tomatoes here, harvest time lasts 10 months for one planting time．The yield can be up to more than 46 kg per square meter．That's to say, a workshop of 1000 square meters can yield over 500 tons, as more than 100 times of that of traditional field planting．
Factory planting has already had decades' history in western countries and been very popular in countries of Israel and Holland．In Holland, there are 4700-ha glass greenhouse in the whole country and Israel as a country of desert becomes a great exporter of agricultural products by adopting workshop planting．It is obvious that workshop planting is an effective way to improve yield of unit area of the land, save resources of land and water, increase quality of agricultural products, reduce labor intensity and produce healthful, advantageous products without pollution．For the national situation of our country of numerous people sharing limited land, it's significant to demonstration and popularization of workshop planting．
(1)
Which is the best title for this passage?
[ ]
A．
Planting crops．
B．
Greenhouse planting．
C．
Agriculture today．
D．
The history of factory planting．
(2)
Crops can be grown ________ in a greenhouse．
[ ]
A．
without water
B．
without nutrition
C．
without soil
D．
any sources
(3)
If the yield of the greenhouse is 50 kg per square meter, what may be the yield of the traditional field planting per square meter?
[ ]
A．
5 kg．
B．
10 kg．
C．
0.5 kg．
D．
46 kg．
(4)
Which of the following statements is not the advantage of greenhouse planting according to the passage?
As any homemaker who has tried to keep order at the dinner table knows,there is far more to a family meal than food．Sociologist Michael Lewis has been studying 50 families to find out just how much more．
Lewis and his co-workers carried out their study by videotaping（录像）the families while they ate ordinary meals in their own homes．They found that parents with small families talk actively with each other and their children．But as the number of children gets larger,conversation gives way to the parents' efforts to control the loud noise they make．That can have an important effect on the children．“In general the more question-asking the parents do,the higher the children's IQ scores,”Lewis says．“And the more children there are,the less question-asking there is．”
The study also provides an explanation for why middle chidren often seem to have a harder time in life than their siblings（兄弟姐妹）．Lewis found that in families with three or four children,dinner conversation is likely to center on the oldest child,who has the most to talk about,and the youngest,who needs the most attention．“Middle children are invisible,”says Lewis．“When you see someone get up from the table and walk around during dinner,chances are it's the middle child．”There is,however,one thing that stops all conversation and prevents anyone from howing attention：“When the TV is on,”Lesis says,“dinner is a non-event．”
(1)
The writer's purpose in writing the text is to ________
[ ]
A．
show the relationship between parents and children
B．
teach parents ways to keep order at the dinner table
C．
report on the findings of a study
D．
give information about family problems
(2)
Parents with large families ask fewer questions at dinner because ________
[ ]
A．
they are busy serving food to their children
B．
they are busy keeping order at the dinner table
C．
they have to pay more attention to younger children
D．
they are tired out having prepared food for the whole family
(3)
By saying “Middle children are invisible”in paragraph 3,Lewis means that middle children ________
[ ]
A．
have to help their parents to serve dinner
B．
get the least attention from the family
C．
are often kept away from the dinner table
D．
find it hard to keep up with other children
(4)
Lewis' research provides an answer to the question ________
[ ]
A．
why TV is important in family life
B．
why parents should keep good order
C．
why children in small families seem to be quieter
D．
why middle children seem to have more difficulties in life
(5)
Which of the following statements would the writer a gree to?________
[ ]
A．
It is important to have the right food for children．
B．
It is a good idea to have the TV on during dinner．
C．
Parents should talk to each of their children frequent
D．
Elder children should help the younger ones at dinner．
