问题 单项选择题

光照、雷电对植物来说是()

A.气候因子

B.生物因子

C.土壤因子

D.人为活动

答案

参考答案:A

材料分析题

星期天的上午,小红和妈妈一起去超市购物,在挑选洗衣粉的过程中,发现无磷洗衣粉的价格比较高,含磷洗衣粉的价格比较低。妈妈看着这两种洗衣粉,犹豫起来。

(1)请你帮助小红妈妈做出正确的购买决定,并说明理由。

                                                                                                                                                                

                                                                                                                                                               

                                                                                                                                                               

(2)请列举你在日常生活中自觉保护环境的两则实例。

                                                                                                                                                               

单项选择题