为提高大棚中蔬菜的产量,可采取的正确措施是()                          A.白天适当...

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为提高大棚中蔬菜的产量,可采取的正确措施是()                          A.白天适当...

为提高大棚中蔬菜的产量,可采取的正确措施是()                          

A.白天适当降温                                                                           

B.白天适当提高温度,夜间适当降温                                            

C.白天和夜间都应适当提高温度                                                    

D.夜间适当提高温度                                                                        

【回答】

B

知识点:光合作用

题型:选择题

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