题干

如图为对刚收获的种子所做的一系列处理,据图分析有关说法正确的是(  )

A:④和⑤是同一种物质,但是在细胞中存在形式不同

B:①和②均能够能萌发形成幼苗

C:③在生物体内主要以化合物形式存在

D:点燃后产生CO2中的C只来自于种子的糖类

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答案(点此获取答案解析)

A

同类题3

阅读下面短文,从每小题所给的A、B、C、D四个选项中选出最佳选项。

    I was hurrying to our basketball game one morning when Hillary Barnes, the most popular girl in school, stopped me. "Are you the twin who won the art competition?" she asked.

    "No, that's Christine. I'm Katie." I said.

    We were not the same. In fact, we were quite dissimilar. She could beat Snow White in a beauty contest! Compared to Christine, I felt like one of Cinderella's ugly stepsisters.

    One Saturday Christine gave me a painting lesson because I was always trying to be artistic too. But I knocked over the vase of flowers. Instead of becoming angry, though, she turned the whole mess into a dreamy masterpiece*. You could look at it five different ways and see five different things. With this excellent creation, she won First Prize in the art competition. I really envied her, but I knew it wasn't her fault. I was the one with wild, unmanageable hair and no talent.

    Joining Christine's basketball team was my latest effort to be like her.

    On the way to the gym, I've made up my mind to give my best performance in that day's game. As soon as we arrived at the gym, I couldn't wait to warm up. "Christine, here!" I threw her a ball. It was too high and she missed it. The ball fell onto the recorder and broke it which was used to play the national anthem before each game.

    I apologized as I picked up the broken pieces of the recorder. Coach looked at the mess and asked, "How are we going to play the song now?"

    Christine suggested, "Let Katie sing it! She's always singing at home."

    Coach asked. "Would you?" I found myself nodding.

    Coach announced the national anthem and everyone stood. Standing before a microphone, I looked up to the flag. The notes seemed to flow from deep inside me, and my voice was clear. When I finished, the gym was silent. Then it was filled with applause. As the game started, teammates gave me the "thumbs up" sign.

    The next morning Hillary Barnes stopped me in the hallway and asked, "Are you the twin who sings?"

    "Yes, that's me." With smiles on my face, I walked to the classroom.