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We often think of agriculture as planting seeds and harvesting crops. But
We often think of agriculture as planting seeds and harvesting crops. But
游客
2024-03-11
42
管理
问题
We often think of agriculture as planting seeds and harvesting crops. But many crops do not come from seeds. Many kinds of trees and plants are grown from【C1】_________cut from existing trees and plants. This is called grafting (嫁接).
Farmers cut branches or young growths, called【C2】_________, from one plant and place them on a related kind of plant. The branch or bud that is grafted is called a scion (接穗). The plant that【C3】_________the graft is called the root stock. Over time, the【C4】_________from the two plants grow together. The grafted plant begins to【C5】_________the leaves and fruit of the scion, not the root stock.
A graft can be cut in several ways. A cleft graft (割接,劈接) , for example, requires a scion with several buds on it. The bottom of the scion is cut in the【C6】_________of the letter V. A place is cut in the root stock to accept the scion. The scion is then【C7】_________ placed into the cut on the root stock. Growth medium is put on the【C8】_________to keep it wet and help the growth.
Grafting can join scions with【C9】_______qualities to root stock that is strong and resists disease and insects. Some common fruit trees such as sweet cherries have to be grafted.
In an age of high-technology agriculture, grafting is a low-technology method that remains【C10】_______important.
A) blossoms
B) pieces
C) composes
D) parts
E) securely
F) extremely
G) buds
H) agreeable
I) accepts
J) relatively
K) grow
L) desirable
M) produce
N) shape
O) joint [br] 【C10】
选项
答案
F
解析
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