单选题The photoperiodic response of algae actually depends on the duration of darkness, but not on the response of light.Ais not on lightBbut is not on the lightCand not on lightDthe light is not on
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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