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【单选题】
从自然界分离新菌种一般包括四个步骤，下列不属于四个步骤之一的是
A.
采样
B.
增殖培养
C.
基因诱变
D.
性能测定
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【多选题】下列化合物遇碱显黄色，需经氧化后才显红色的是：（）
A.
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B.
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二蒽酮类
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羟基蒽醌甙
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【单选题】Which one of the following can NOT be used to mean "I love sport and it is very important for me".
A.
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B.
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C.
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D.
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【单选题】Which one of the following can NOT be used to mean "I love sport and it is very important for me".
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B.
I enjoy some sports, though I'm not a fanatic.
C.
I'm not that into sport, to be honest.
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