题干

下列有关细胞代谢的说法,正确的是(  )

A:酶能降低化学反应的活化能,而无机催化剂不能

B:有叶绿体的细胞才能进行光合作用

C:在人体激烈运动时骨骼肌细胞中的ATP含量会显著下降

D:有氧呼吸的第二阶段需要消耗水

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答案(点此获取答案解析)

D

同类题4

请用适当的词完成下面的短文,并把所缺单词填写在指定的位置上。每个空只能填写一个形式正确、意义相符的单词。

    A big company wanted to find someone to work for them. Lots of young college students came to ____ for the job, but only a small part of them were left. And this time, the company didn't plan to choose the right persons ____ usual.

    Here came the day when they took the final interview. A big box full of papers was placed on the ____ to the interview room, and a few papers were lying around the box.

    The first student came. He hurried along the way to take the interview. “Who put this box in the middle of the road?” the student said to himself, ____ he did not try to move the box away. Instead, he passed around the box and continued his way.

    The second student came along and did the ____ thing. Then another came, and another. All of them complained (抱怨) about the box but ____ of them tried to move it. What's worse, someone even stepped on the papers and left without having a look at the things on the ground.

    Half an hour ____, a thin young man with glasses came. He was also among those who were left to take the interview. He saw the box and the papers around it. Without thinking twice, he stopped and began to ____ up the papers and put them into the box. Then he managed to move the box to the side. To his great ____, he found an invitation under the box. On it were the following words, “Congratulations, young man! You are the ____ person we are looking for! Would you like to join us?”

    Sometimes, you see, helping others is helping yourself.