問題詳情

四. Matching： 
(A) fertilizers
(B) occupation
(C) vertically
(D) feed with
(E) put into practice(AB) nutrients(AC)cultivation(AD) virtually(AE) feed on(BC) hung on to     Canada Thistle, also known as the creeping plant, is famous for its evil effects on crops and vegetation as well as its aggressive __31__ of the land. It is very difficult to control this plant as its roots extend across a very long distance. Even if you try to pull it up, the Canada Thistle can easily recover. It is also one of the few plants that cattle do not __32__. Growing from just a tiny seed, it can extend its roots horizontally for more than 15 feet and __33__ from 6 to 15 feet. Thus, you can see how an extensive root system is developed. So, how do the farmers manage to control the creeping plant? The key is to put the plant under constant stress, so that it uses its __34__ from the roots. Many farmers also attempt to use chemical control. Mechanical control can be __35__ as well. Farmers can even mow a meadow and use chemicals at the same time to control the weed.
31

參考答案

答案：B
難度：簡單0.714286
統計：A(0),B(5),C(1),D(0),E(0)

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