题干

图甲为横放在地面上的植物的生长状况,图乙为植物生长素浓度对植物生长的影响曲线.下列分析正确的是(  )

A:图甲中a、b、c、d四点的生长素浓度大小为a>c、d>b

B:若图甲中a点的生长素浓度为10﹣10mol/L,则c点所对应的浓度介于10﹣10~10﹣8mol/L之间

C:若图甲中b点的生长素浓度与图乙中E点对应的浓度相同,则d点的生长素浓度在E~B对应的浓度区间

D:生长素在F~A对应浓度范围内促进生长,在A~D对应浓度范围内抑制生长

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答案(点此获取答案解析)

C

同类题5

阅读下列短文,然后从每小题A.B.C.D四个选项中选出能回答所提问题或完成所给句子的最佳答案。

We have heard about people who have special memories. Recently there has been a report about a woman from Australia who can remember almost every detail (细节) of all the events in her daily life.

    Rebecca Sharrock, 25, is one of just 80 people worldwide who have been identified(确定) as having Highly Superior Autobiographical Memory ( HSAM,超级自传体记忆症). It means she can remember every small event—which most people would forget with in (在......以内) days—as if it had happened just minutes ago.

    "I remember my mum putting me in the driver's seat of a car and taking a picture of me when I was 12 days old,” she said. " That's my earliest memory. I remember every day since then. I can't tell all the dates exactly because I was too young to understand calendars, but I remember what I did that every day, what the weather was like and so on.”

    Rebecca can also re—experience taste. If she's eating something that she doesn't like, she thinks about Black Forest cake, her favorite food, and the memory will be so strong that she can nearly "taste” it.

    However,  sometimes her memories prove (证明) to be painful. Because they're not just events that she remembers. "When I relive (再体验) memories, the feelings return, too,” Rebecca said. "For example, I remember falling over when I was three at my grandparents' house and hurting my left knee. Talking about it now, I feel painful in my left knee. "

    "At night, I have to sleep with the radio/recorder and a soft light on, she added. "1f it's too dark or quiet, my mind would be filled with all these memories and I can't sleep. "