可能导致动物痛苦而对人类或动物没有任何实质性医疗利益的改变动物遗传特征的方法和由这些方法产生的动物被排除了可专利性。
参考答案：对
Not only should you get used ______ under difficult conditions but you also you pay more attention ______ your work well.
A．to work, to do
B．to working, to doing
C．to work, to doing
D．to working, to do
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