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单选题
The photoperiodic response of algae actually depends on the duration of darkness, but not on the response of light.
A
is not on light
B
but is not on the light
C
and not on light
D
the light is not on
参考答案
参考解析
解析：
结构应用。句意：事实上海藻的光周期反应取决于黑暗的持续时间，而不是光。可知前后为并列关系，英语中表并列关系用and，并且抽象名词和物质名词前不加冠词，因此正确答案为选项C。
结构应用。句意：事实上海藻的光周期反应取决于黑暗的持续时间，而不是光。可知前后为并列关系，英语中表并列关系用and，并且抽象名词和物质名词前不加冠词，因此正确答案为选项C。
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indication B
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