大多数细胞的直径不到0.01cm，细胞之所以体积小原因是（　　）

—Does he often _________?

—No, he often goes to bed early.

依次填入下面句子横线处的词语最恰当的一项是（    ）

       你若盛开，那是                在春日枝头上的一种情怀。盛开，是花朵潜伏已久的梦，也是它不得不          的一种职责。盛开，总是羡丽的，花朵的盛开是         ，是热闹；生命的盛开是激情，是           。

某DNA片段所转录的mRNA中尿嘧啶占28%，腺嘌呤占18%，则这个DNA片段中胸腺嘧啶和鸟嘌呤分别占（    ）

先通读下面的短文，掌握其大意，然后从A、B、C、D四个选项中选择可以填入空白处的最佳答案。
    Carole worried a lot about her weight(体重).She was a little too large,and she  1 that's all because she ate too much junk food.When Carole felt2 ， she loved to eat junk food to make herself feel better.Chocolates and cookies were her favorites.But when her stomach felt very full, she3wanted to eat.It was clear that she had no control over both food and bad feelings.Carole's parents were quite worried about Carole.They took4to see a doctor.The doctor didn' t think Carole was sick.He just told her some5 of developing better self-control(自制力).
    According to the doctor ,using6 for comfort (慰藉) is not always a bad thing.7if the first thing one wants to do is open his fridge(冰箱)whenever he is upset，it can be a problem.He asked Carole to try hard to8the habit of eating for comfort.He advised her to do9else to have fun，like talking to someone on the phone or going out with Mends when she felt unhappy.
    Carole felt the doctor's advice was really10.When she left.she was sure she would soon make a change!