题干

ATP是细胞中能量的通用“货币”,下列有关ATP的叙述正确的是(    )

A:ATP中的“A”与构成RNA中的碱基“A”表示同一物质

B:为保证能量的供应,细胞内储存有足量的ATP

C:在有氧与缺氧的条件下,酵母菌细胞质基质中都能合成ATP

D:生物体生命活动所需能量直接来自于ATP中两个高能磷酸键的断裂释放

上一题 下一题 0.0难度 选择题 更新时间:2015-01-16 05:32:43

答案(点此获取答案解析)

C

同类题5

请认真阅读下面短文,并根据短文内容回答问题。
      Do you feel lonely when your best friend isn't around? Here's our advice to you ---and to all kids who feel lonely sometimes. 
It's hard when a best friend isn't around --- maybe because he or she moved to a different school or a different class. You may feel left out at break or lunchtime. You want to have new friends, but how do you make them? Maybe it seems everybody else already has his or her friends. But remember, there's always room for more friends.
      Start by looking around your classroom --- think about which kids you'd like to play with at break. Look for chances to say hi to them, smile, and be friendly. Offer to share something or express your appreciation (欣赏) to them. Invite someone to play with you or say, “Do you want to sit here?”in the lunchroom. When you're at break, walk over to kids you want to play with, act friendly, and say “Hi, can I play, too?” or just join in. 
     If you have trouble doing this or if you're feeling shy, ask your teacher to help you make new friends. Teachers are usually pretty good at matching up friends. The best way to make friends is to be a friend. Be kind, be friendly, share, say nice things, offer to help ---and pretty soon, you'll have one, or two, or even more new friends.
     You might still miss that special best friend. But when you see each other, you can share something you didn’t have before he or she left. You can introduce him or her to your new friends!
(请将答案写在答题卡上)