题目

在下列四组实验条件下，测定了不同光照强度对光合速率的影响，结果如曲线图所示。①0．1% CO2 、30℃；②0．1% CO2 、20℃；③0．03% CO2 、30℃；④0．03% CO2 、20℃。下列叙述中错误的是（ ） A.比较曲线①和②可知，30℃光合作用酶的活性高于20℃B.比较曲线①和③可知，适度提高CO2浓度能提高光合速率C.比较曲线①和④可知，温度和CO2浓度是光合速率的主要影响因素D.P点四条曲线重合，说明此时光照强度是光合速率的主要影响因素Choose the word or expression in the box which is closet in meaning to the underlined part in each sentence （ 选择方框中与划线部分意思相近的词）:A. owns B. want to C. keen on D. enjoy E. enclosed F. ambition【1】They would like to be pen-friends in the future.【2】She put some photos of her family in her letter last week.【3】My dad has a Chinese restaurant nearby and my mum works in a college.【4】She is fond of pop music and writing poetry.【5】Alice's dream is to become a dancer when she grows up.