题目

根据句意，用方框中所给词组的适当形式填空。 once in a while, shut off, depend on, plenty of, in time 【1】I think I shouldn't always ________________ my parents since I've grown up.【2】There are ________________ vegetables in the market.【3】He ________________ the washing machine after washing the clothes.【4】________________, I don't like listening to loud music.【5】You'd better review what you have learned____________.在适宜温度下，采用完全营养液培养黄瓜幼苗，研究营养液中氧含量变化对K+吸收速率的影响。实验结果如图所示。请据图分析回答下列问题：(1)黄瓜幼苗根系细胞吸收K+的方式是__________，图中ab段说明____________________，表明该过程需要__________。曲线bc段限制K+吸收速率的内在因素是__________________(2)植物的生长都有一个最适温度。在氧含量等条件稳定、适宜的情况下，研究在10℃一40℃范围内的温度变化对黄瓜幼苗K+吸收速率的影响。请预测K+吸收速率变化的趋势是_______________________________________________