Can hard work be replaced by machines in agriculture? Yes, man is trying out automatic (自動(dòng)化) farming. It is fun to watch a machine picking tomatoes. The strange machine sails like a ship across a sea of plants. In its front is a hole. As the machine moves forward, tomato plants are pulled into the hole. The tomatoes are gathered while the rest of the plants are thrown back onto the fields.  Twelve workers sit on top of the machine. They rapidly pick out the bad fruit from the tomatoes. A red stream of ripe tomatoes is being sent into a cart that is pulled alongside the machine. One driver and twelve workers can pick in an hour ten tons of a new kind of tomato. Without the invention, it would take 60 men to do the job.

Not all plants cooperate well with the farming machines. Take lettuce(萵苣)for example, seeds plants in the same field in the same time ripe at different times. The only way to tell a ripe head of lettuce is to look at it and feel it. And now there is a machine even to do that!

There is a special machine to test lettuce. When it moves over one that feels right, it sends a signal back to the picking machine which goes behind. The cutting and picking is done satisfactorily by this unit.

This passage mainly tells us something about        .

       A．the machines picking tomatoes      B．a(chǎn)utomatic farming

       C．the science of farming     D．a(chǎn)griculture machines 

After the bad tomatoes are picked out,        .

       A．the others are sent into a cart nearby

       B．the workers carry them away

       C．the others are put into bags

       D．the others will be thrown into the field

The last paragraph mainly tells us          .

       A．that lettuce is not good to get in

       B．that a special unit of machines has been made to test and pick lettuce

       C．a(chǎn)bout a wonderful machine that can be used pick all kinds of plants

       D．that lettuce is not a cooperation plant

【小題1】D

【小題2】A

【小題3】B


解析:

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