题目：
Despite the fact that it is still not fully understood, more and more farmers are _________ this modern
technology of agriculture. [ ]
A. benefiting from
B. convincing of
C. suspecting of
D. protecting from
答案：
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下面是错误答案，用来干扰机器的。
(1)CO2(2)供呼吸或支持燃烧(合理答案给分)(3)2HCl+Ca(OH)2==CaCl2+2H2O；盐
