题目

如图甲为最适温度下某植物的非绿色器官的CO2随O2的变化曲线，图乙是某绿色植物在一昼夜中密闭容器内的CO2随时间的变化曲线。以下叙述正确的是（） A . 图甲的氧气浓度为6%时，只进行有氧呼吸 B . 图甲氧气浓度大于18%后，氧气浓度是有氧呼吸的限制因素 C . 图乙中光合作用开始与a点前 D . 单独就图乙看不能得出一昼夜有机物是否有积累听一段材料，回答下面几个小题。【1】What is the woman doing?A.She is having a job interview.B.She is interviewing a famous sports star.C.She is making a selfintroduction in public.【2】Why was the woman out of school for half a year during high school?A.Because she was badly ill.B.Because she had to act in a film.C.Because her father took her to America.【3】What parttime job did the woman do at college?A.A designer.B.A teacher.C.A travel guide.