题干

如图表示某植物非绿色器官在不同氧气浓度下氧气的吸收量和二氧化碳的释放量,根据所提供的信息,以下判断正确的是(  )

A:N点时,该器官氧气的吸收量和二氧化碳的释放量相等,说明其只进行需氧呼吸

B:M点是贮藏该器官的最适氧气浓度,此时厌氧呼吸的强度最低

C:该器官呼吸作用过程中有非糖物质氧化分解

D:L点时,该器官产生二氧化碳的场所是细胞中的线粒体基质

上一题 下一题 0.0难度 选择题 更新时间:2019-02-23 03:21:24

答案(点此获取答案解析)

C

同类题4

阅读短文及文后选项,选出可以填入空白处的最佳选项, 并在答题卡上将该项涂黑。

    It is fun being a vet. ____, every day is different! It all depends on what is wrong with the animals that come in.

    At my clinic, I work long days on Mondays, Wednesday and Fridays, and short days on Tuesday, Thursday and Saturdays. Sunday is my day off so I can spend some time with my family.

    ____ My clerk opens the door, turns on some music, and makes everyone a cup of tea or coffee. My assistant cleans and feeds the animals. The phones start to ring, and people make appointments. This is a very busy time of day!

    At 9 am, pet owners start to arrive with their sick pets. Appointments take up the whole morning.

    ____ I don't examine any new sick animals. I use these two hours to have lunch and do all my paperwork.

    At 2 pm, I start to see sick animals again. At 5 pm, three students from a local school who love animals arrive to help out. ____ I am always happy to see their smiling faces!

    From 5 pm to 7 pm, I continue to see sick animals. Then, at 7 pm we close our doors and the clean-up begins! We tidy the clinic and feed and clean the animals Of course, we also stroke (轻抚) them and give them hugs !Then, we turn off the lights and go home. ____

    I'm very happy being a vet, though unexpected things sometimes happen!

A. I like it because although it is hard work

B. At midday, I stop for two hours.

C. My day at my clinic begins at 7 am.

D. This is the type of the day I want to have.

E. They are very kind and warm-hearted.