Reading passages


- It is understood from the passage that, in the field of measurement --------



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Reading passages

261- It is understood from the passage that, in the field of measurement --------.
A) British engineers were too slow to appreciate accuracy 
B) Whitworths's work was soon to be substituted by far better quality tools 
C) only a few advances would be made until the middle of the 20th century 
D) Whitworth achieved a remarkable degree of accuracy 
E) Whitworth's inventions attracted little attention 
Weeds can cause considerable financial loss through the cost of their control and the 
damage they do to crops. Plants which become really troublesome as weeds are those 
which persist despite farmers' efforts to control them. Such persistency is due to 
several factors, of which perhaps the most important are prolific seed production 
coupled with the often remarkably long inactive periods of the seed, and the ability of 
vegetative part of some plants to survive mechanical damage and adverse conditions 
and to set up new plants. Weeds may be controlled by hand, by cultivator and other 
mechanical means, by biological means and by chemical weed killers. Chemical weed 
killers are widely used, either to kill totally and suppress all vegetation or to control 
weeds selectively in crops.
262- The author points out that weeds lead to considerable financial loss------- .
A) since they appear where they are not wanted 
B) as very little effort is made to control them 
C) because all weed killers destroy the crops as well as the weeds 


 
 
187 
D) as they are all aggressive and able to survive despite man's efforts to control them 
E) since the control of them is expensive and when they are left uncontrolled they harm 
crops 
 
263- We can infer from the passage that one reason why some weeds can be 

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