2. 职称英语
  3. 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  64
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] 【C6】
选项
答案 N
解析
转载请注明原文地址:http://tihaiku.com/zcyy/3524425.html
相关试题推荐
随机试题
最新回复(0)